COMMON plumbing issue damaging new RVs - check yours!

[@johnmacias971]

we now know the problem, what can we swap or change to help prevent this. Waiting for a demonstration video on how you wold repair this.

[@baffledbybullshit-]

Swap it all out. All.

[@TwoGoatsRacing]

I just finished upgrading to all brass/stainless steel fittings, and replacing all of the vinyl tubing with pex in my Grand Design trailer. I did it myself, and I am very happy with the results!

[@Scootersps]

Thank you for commenting on this. Finally, a KZbin RV tech talking about this. The flexible hose connected with PEX connectors and cinch ring will eventually leak. Every camper that I have owned has developed leaks in these connections. I always must redo the plumbing. As you mentioned, no plumber would do this in a house because it will leak, and it’s against the code. I think many RV owners are unaware of this significant problem. I still cant believe why this is not all over youtube.

[@undercoverrvtech]

Thanks for watching! There are actually RV's that don't do this. Keep an eye out for my review videos coming up to see which do and don't.

[@peckerpeter2078]

Compression fittings leak in a house too and plumbers use those. soldered connections Male to female is the best no leaks with pipe dope.

[@wallacegrommet9343]

As a boater, flexible hose is always double clamped to a hose barb, or installed in a threaded twist lock connector. Because sinking ruins everything

[@brenttarry7153]

I make the plumbing line assemblies for Pleasureway Industries and we don’t use those flexible lines, at least on the pressurized side of the pump. We also don’t use the pinch rings shown in this video, we use the full copper crimp rings on pex lines. Just saying for those looking for companies that don’t use the lines shown in this video. 🙂👍

[@undercoverrvtech]

Thanks for sharing! Pleasureway is on my list to check out. Thanks for watching!

[@betterwithrum]

Jacob, you nailed it, RV manufacturing needs regulations and codes.

[@adaycj]

"The wrong type of tubing". You said it exactly right. It's like the builders are weekend hardware store parts bin pickers. I've had to completely replumb my last two RVs. 1000 thumbs up.

[@undercoverrvtech]

Thanks! There are RV manufacturers that are not doing this, keep an eye out for my upcoming review videos!

[@adaycj]

@@undercoverrvtech Sadly I looked at a brand new Winnebago last week. 90% blue and red PEX with Oetiker clamps. 10% nonsense nylon braided hose I'd use to drain an aquarium. A bunch of it was on the pressure side too. Not just tanks flush lines and threaded hose fill ports. Pulling shower pans and dropping colroplast to extract the junk gets old quick. And the warranty fingerpointing never ends. They'll pay to fix the active leak. They never authorize to fix the soaker hose of incompetence they created. I look forward to your manufacturer specific video.

[@tarraann4280]

⁠@@undercoverrvtech do you have a video on how to re-plumb if we encounter this?

[@RVMiles]

We've had 3 RVs in 5 years, and all 3 leaked at the water heater connection for this exact reason. One actually blew the flexible tubing hose off, which is why we tell as many people as possible to always shut the water off when you're not at the RV.

[@pazstephen9779]

We had that exact leak. The hot water heater bypass had PEX clamps around flexible vinyl hoses. Ridiculous. BOTH the cold in and hot out leaked at the PEX clamp join. Hose clamps with the hex fitting fixed them. Very poor quality to use PEX clamps in this way.

[@raycalandra1887]

Thanks for raising this issue. My I have a 2021 Forest River Mini/Micro Lite from the Rockwood/Flagstaff plant. I have to say that for a Covid Era unit I have been very pleased with the Quality Control. Very few issues. However, the one issue I found in my first year of ownership was exactly what you are pointing out. In my back bay where the water pump, water heater, and water filter are situated, I found 5 joints where the vinyl hoses were pex clamped onto pex fittings, were leaking. I used a mixture of barb fittings and heavy duty worm gear hose clamps to resolve the issues. The dealership just wanted to reclamp with pex clamps. I told them I would take care of it myself. The wife and I have been camping and traveling in Travel Trailers for 40years and are on our 6th travel trailer. I'm use to correcting these kind of problems.

[@nicola3060]

Water is my arch enemy at this point after living full time in a renovated old travel trailer permanently set up on a farm . Every single sink / plumbing / leak that could happen, has 😂💀. Thank goodness for KZbinrs like you and others who teach me wtf I’m supposed to be doing 😂

[@charlesklaus6290]

I just recommended you and your videos to JD at Big Truck Big RV(KZbin channel). His video was entitled Water Damage and he had a shower drain pipe freeze and crack. When he pulled the panel off behind his water management system and shined a light back there I said "Damn" out loud! The plumbing was awful...lots of Pex to Flex with the Flex visibly swelling. I advised him to check out your videos on plumbing which I have learned so much from. Hopefully he will do that and address those issues before the inevitable leaks start. Thanks Jacob!

[@rdance3]

Great video. Can you post a video of how one might convert a poor flex tube application to something more reliable? What is the fix? Change the fitting to some kind of adaptor (1/2" PEX x 1/2" PB Coupling) or remove flex hose?

[@starhopper457]

Jacob has... he has three separate vids on how to correct these ( a part 1, 2, and 3). Fortunately for us, we don't have too much vinyl tubing but we we do have is being swapped out.

[@stevezeno]

Just checked my 2022 Rockwood Geo Pro (aka Flagstaff E Pro). The plumbing is just as your video warns. Flexible tubing and PEX pipe crimped to the same connectors.

[@kmik5682]

Your video explains a lot! I have a 2020 Aliner Titanium. That exact tubing was used on the Sink Faucet and it started leaking the 1st year. Leaked on every use and made our boondocking a nightmare. I had to remove all the old Flex tubing and reinstall correct fittings and a decent faucet. Problem fixed.

[@undercoverrvtech]

Sorry to hear that. Yes it is a widespread issue, glad to hear you were able to fix it.

[@barbaradowney4207]

Thanks Jacob! Another informative, great video. I've seen so many people in FB groups talking about these types of leaks. It's pitiful that there aren't any real basic regulations that RV manufacturers have to adhere to. People would be willing to pay a bit more for the correct plumbing materials, I know I would. I really dislike greedy corporations. Ugh.

[@undercoverrvtech]

The sad thing is that there is an industry association and they do have to meet their manufacturing guidelines to have the RVIA seal on a camper. Apparently the RVIA doesn't know or care about this problem.

[@barbaradowney4207]

@@undercoverrvtech I'm wondering about Brinkleys. Have you had a chance to check out their plumbing? Josh The RV Nerd did a factory tour and shows under the island sink quickly but I don't know exactly what to look for. Brinkley seems to be trying to make RVs with a higher level of quality. Thanks for any insight.

[@undercoverrvtech]

Yes I have! Watch for a video coming soon about them.

[@barbaradowney4207]

@@undercoverrvtech Okay, great!

[@riotwarrior]

I have had a hell of a lot of issues becaue of the craptasticplastic pex fittings. WE HAVE ADDED A FOUR filter water filter setup with a 5 micron sediment then all the way down to .5 micron carbon block filter. After that it passes a small household dual tank Kinetico water softener. Soon we are adding a reverse osmosis and UV light as well. The main filters and softener are for the entire 5th wheel. The UV will be for entire unit but the RO will be a drinking faucet at the kitchen and one in master bathroom. This has provided a much needed protection to apliances and fixtures. As I go I replace as much craptasticplastic fittings and those stupid hoses as I can to make a good right tight n true setup. thanks for the video

[@joepeach997]

You are giving me what I want and what I need to be educated in this field. Looking forward to a great friendship, Thank You!

[@roberttyminski4203]

More time fixing things then enjoy actual vacation. Tent camping for me-no worries, no breakdowns, no equipment costs, no maintenance, no storage. Thanks for the heads up. I learned lot from your channel.

[@thefpvlife7785]

This fantastic and very important topic earned a new sub. Your honesty is greatly appreciated. Rock on.

[@undercoverrvtech]

Thanks for the sub!

[@scrippslarry]

You are 100% right! Those flexible vinyl tubes are bad news!

[@nigechubb9030]

Wonderful video - thank you! My 2022 Riverside Retro RV was all vinyl on pex clamps and I have fixed at least 12 leaks so far. I hired a plumber to do the first one and then he showed me how to do the rest. I used pex to barbed adaptors using a short length of pex using a pex clamper, and then clamped the vinyl hose properly with a screw-tightening steel ring on the barbed portion. None of them have leaked again but there are still a few places that haven't started and I suspect there will be more leaks from these. I do use a pressure regulator but actually the water pump seems to have pretty high pressure and when I'm not hooked to city water I don't know how to prevent this pressure other than turning off the water pump all the time. The dealer did one repair only - the shower water hoses because the leak required the fridge to be moved to fix. But even then they said they could not repair with barbed connections because they only get reimbursed by Riverside to restore it to the condition to which it was built. To prevent this from happening again I installed cutoffs on these two hoses (hot and cold) from the pump area to the shower so that I can make sure there is no pressure in these shower hoses except when I actually need to shower, and then turn them off again right away after showering. A bit of a pain but better than having to have the fridge removed again for another leak.

[@undercoverrvtech]

Wow, that is a huge problem if they will not actually solve the problem for you. Yes it is difficult to correct this problem on many campers, which is why I want to push for industry change. It is not fair to people like you to make a leaking rv and then refuse to fix it.

[@RebeccaBarrett-xu3mq]

Would love to see more videos like this. I am not handy. This ‘show and share’ without a lot of extra information- to the point method was incredibly helpful. And very clear. Thanks!

[@undercoverrvtech]

Glad you like it! Yeah most of my clients are not wanting to learn how to fix things, but definitely want to know how to avoid hiring me! Lol

[@NinjaCraft105]

I had this issue and also cheap valves bypassing with high water pressure. Had to replace one hot water line and put a pressure regulator in line to prevent further bypassing valves

[@jamesbouse8232]

We will be picking up our RV next week. I will check the plumbing for this. Thank You!!!

[@clintstevenson1214]

Jacob! Great video. Thanks. It would be nice to see a video where you add an inline water valve to shut off the toilet water when those cheap toilet pedal valves explode causing one to turn off the pump etc.

[@sheithaus100]

As a Lic. Master Plumber, one of the first things I noticed in both my RVs is the subpar waterline installations. Most of the problems I have encountered were/are plumbing related. You'd think manufacturers would have an actual plumber on staff.

[@undercoverrvtech]

You would think that in a 100 billion dollar industry that would be the case. Apparently corporations exist to make profit, and you don't need to hire plumbers to make and sell RV's....I'm really disappointed that the Industry Association does not prohibit this type of plumbing connection. Every RV has a seal stating that it conforms to RVIA electrical and plumbing standards. Apparently that is merely a joke as they don't have meaningful plumbing standards.

[@explorenaked]

They do have a plumber on staff. He's the guy on staff that once installed a faucet in his home all by himself. I mean, what other qualifications do you need to work as a "master" plumber at Winnebago?

[@JohnNguyen-iw8qn]

Be thankful if they did you'd have to get licensed for electrical, plumbing, etc. At the end you'd need to be a full licensed contractor to fix a simple issue on an RV.

[@kaseyhertig6132]

Thank you so much! I discovered this leak in my brand new 2023. How do you suggest we fix this?

[@sarahann530]

​@@JohnNguyen-iw8qn So you would rather shitty plumbing and water leaks

[@JenniferDerendinger]

We have a '23 Entegra Launch which is manufactured by Jayco. We have the flexible vinyl tubing with PEX fittings and boy or boy, the leaks have been ongoing throughout the water system. What I have discovered is the ID of 1/2 PEX is .485 and ID of of the 1/2 inch vinyl tubing is .5 hence why so many leaks. I have been replacing with 1/2 barbed hose fittings NOT PEX fittings and using hose clamps to secure. So far so good.

[@garyc.8488]

Jacob, OK how to safely test the entire water system for a leak in an RV? I made a combo winterizing connection / leak down test fitting. It attaches to city inlet then regulated compressed air. Pressurize the RV, 40 PSI or so, close the valve in the tool that locks the air in the rig and a built in gage on the tool monitors system pressure. By using regulated air and monitoring pressure loss you are not using more water and possible further wet areas. Its a similar test to new construction rough in plumbing system air testing. Tool layout, air fitting to ball valve to pipe T one leg gets the gage other gets male hose connection to RV. Gary 2007 Airstream Classic 30' Slide Out

[@conniechapin9278]

I used that flexible tubing at the pump, in the old camper with barbed fittings and worm clamps. Never had a problem with it. And it made the pump a whole lot quieter.

[@undercoverrvtech]

Yes, barbed fittings are designed for flexible tubing. The problem is attaching flex to a PEX fitting.

[@Hugo-Hernandez]

Great video, so how would you recommend making the connection between PEX tubing and Flex tubing?

[@Hugo-Hernandez]

@@Don-vi5if Thank you

[@bethsmith4182]

Thanks for the information. Now I know why my plumbing in my outside kitchen is leaking. Now I need to look at all my plumbing connections for I’m sure I will find more that are incorrect and will need to get these corrected. Since I’m still under warranty with my fifth wheel I’d love to have this corrected under the warranty. However if I bring this to the manufacturer and tell them the plumbing was incorrectly installed I already know that their response will be “it’s installed however production wants to install it” like I’ve heard before when I tried calling them out on installing only part of the roller mechanism on my mirrored closet doors and not the whole mechanism. I’ll most likely have to foot the bill to fix the plumbing which I am not able to do at this point in my life. Praying that nothing else leaks.

[@williamjames3304]

I have an older Ceader Creek 5th wheel because of this and other videos you have put out. I went through all my plumbing, and the only place I found the "wrong kind of plumbing " is where the directional value for the winterizing is. Should I change it out, and if so, what type of tubing should I use? The trailer is 20+ years old, and at this point in time I have had no problems with it. And thanks for all the helpful information.

[@Rythsi300]

Would be very interested in which manufacturers do this. May need to rewatch a few factory tours. There should be basic electrical and plumbing code for RVs just as there is for houses imho.

[@rjw8316]

They all do this. They use pex connectors for vinyl hose connecting to pet tubing with crimp fittings.

[@azpete6436]

Forest River does.

[@pioneeredthislife452]

I can tell you forest river and grand design both do it as I've owned both. I'm currently trying to do research on how to add shut off valves...this threw a wrench in all the info and tools I've collected...

[@glp1156]

Rockwood does it.

[@jackelinereyes7610]

My Forest River Rockwood mini lite has this kind of plumbing.

[@joem1070]

Uponor PEX is unlike any other PEX competitor. The connector allow full port fittings by a proprietary tool manufactured by Milwaukee tools that expands the pex which has a memory that then shrinks/compresses the fitting, eliminating the crimp rings in place of a 2nd pex ring that guarantees a secure fit.. We use only Uponor on all of our jobs. It can freeze and then thaw, expanding by 10%. Though Uponor is slightly more expensive, the speed and security it supplies more than offsets the cost.

[@davidj231]

Thanks for this video! Just checked my 2022 Jayco Northpoint 382FLRB and it's all good with PEX and flexible braided metallic hoses... except for the 2nd bathroom's toilet which has PEX fittings/pinch clamps and flexible nylon. 🤬😡

[@petitchenil]

100% correct and just fixed a leak due to that on my Tiffin at the water pump... problem is... a lot more to fix! Mobile tech said it's a common problem and corrected it. I'm an electrician and not a plumber - I know my limitations!

[@undercoverrvtech]

You know, I worked on an older Tiffen recently that had hard PEX all the way to the pump. Seemed to be no issues, so I don't know why they feel the need to do that at the pump.

[@JohnNguyen-iw8qn]

They put flexible hose at the pump as a sound deadening measure. When the pump hammers if rigid pex is connected it can vibrate on 'something' but the flexible hose doesn't have this issue. Twenty years ago they sold kits for pumps to add two flexible hoses to a pump. I think they called it 'pump silencer'.

[@kmv6570]

Thank you. I found many fittings including drain pipes that were not properly tightened in my camper and were dripping water. Had I not upgraded my kitchen faucet I never would have known until the mould and rot started.

[@undercoverrvtech]

Unfortunately in addition to this bad plumbing design, rv manufacturers definitely are suffering from a lack of quality installation and not checking things. Theoretically the dealer PDI should catch and fix those issues, but that is going to have to be another video about their problems!

[@davidk3277]

This is a great video about what the problem is, but HOW DO WE REPAIR THIS? Do we need to tear apart the RV and replace all the vinyl tubing with Pex, or is there a correct type of fitting(s) we can switch over to? For example, would it be appropriate to use a 1/2" barb-to-FIP adapter fitting, connected to a 1/2" PEX-to-MIP fitting? And if so, would that FIP/MIP connection need PTFE/pipe thread sealant? Thank you!

[@bond008a9]

Nice video. Totally agree with your video. I have replaced these flex hoses in our last 3 units day one!! Also I remove all ac ceiling vents and seal them up bc factories do a POOR job of installing them and I want the cold air inside the RV not in my attic space

[@marshallwelsh4115]

Thank you. I'm doing a leak repair now due to this problem. I have flexible hose connected to a black plastic L junction going to hot and cold water.

[@briancurrie5150]

Thanks for the education. I am really looking forward to your review of RVs. We do not have one yet, but have several top contenders as we whittle down the list.

[@undercoverrvtech]

Awesome, thanks for watching!

[@michaelhall8529]

We own a 2019 Newmar motorhome (almost 4 years now) and it is plumbed throughout with PEX tubing. The worse thing I can say about it is that all the tubing is the same color - white. There are a few spots (i.e., toilets) which don't have the PEX tubing, but that is because there is a valve connected to the PEX tubing, and then the flex tubing from this valve going into the toilet area - thus, no pressure issue. And that is the only area where I haven't seen PEX tubing. I can see a lot of PEX tubing, in the basement, under the counters, etc. I think there are other quality manufacturers out there, but I only have experience with Newmar.

[@KU9L]

My GD TT uses the flexible tubing all over in places it is passing through walls & cabinets wherever the lines aren't a straight run. It is also an annoyance because these rough holes punch through walls & cabinets causing the lines to rub on these jagged openings which cause all of the strange noises one hears when they flush the toilet or flip on a faucet. The flexible water hoses are at maximum static pressure before a faucet is turned on, then as the water flows the hose will slide fore or aft slightly as the running water pressure is less than static pressure. I have tried trimming the openings to these cabinets or walls to make the holes more uniform, then wrapping the flexible tubing with a microfiber towel to limit the jerking the tubing does as it slides unevenly. When I first heard these noises, I thought I had a plumbing leak as the rhythm of the ticking of the line rubbing on the rough hole opening sounded just like water dripping ... A sound one never likes to hear while sitting on the toilet! After about 45 minutes of investigation I came to the conclusion it wasn't leaking in this case, but was a poor execution of a terrible slap together job of my Imagine's plumbing. Although we dreamed of our future toy hauler, due to all of these build quality issues that can't easily be fixed, we are seriously considering having small park models at each end of where we work for the summer in CO (District manager for USFS consessionaire) & play for the winter as a snowbird down south. The rub is that we like to play for a month spring & fall between seasons & was horrified at the cost of Class B's that cost $200K which are Junk in 5-10 years like many autos can be. Having slight mobility issues as semi-retired Boomers, we thought maybe a very small Class C was the right answer, still made from junk, but half the cost of an overpriced Class B. But you pointed out the plumbing issue still exists, so we can run, but not hide from this problem. The Minnie Winnie 22M has a Power Gear small bedroom slide, not the worst at least, but still the problem with the plumbing. This is at best a 3 season coach anyway, but most of the plumbing is ducted away in chase ways not easily found. I see the RVIA certification requires flexible plumbing on the water pump, presumably to limit vibration travel by hard plumbing. However companies like Brinkley purchase premade high quality flexible tubing & connectors where needed. Winnebago & Thor need to listen up!!! Thanks for the education, now more research is needed on my part. Davey & Sheila Knapp

[@stevehildreth1934]

We bought a brand new 5th wheel, this is exactly what happened to us! Plus many, many other issues. The dealer had it for "for warranty" service for close to six months before we were able to actually take possession of it. It immediately went back for more issues and was another 3 months. I picked it up again and moved it an hour away from the dealer. It was still leaking profusely. I started performing my own "warranty" service. Two years later it is almost back together. And, it now belongs to someone else. We bit the bullet and bought a much more expensive 5th Wheel, used from a different dealer and even though I've had some issues they have been minor compared to that first 5th Wheel! I am lucky to have the skills, tools and experience to work on RV's. What in the world does someone that doesn't have the ability to address these things do?

[@undercoverrvtech]

That is terrible. Yes the service side of the industry is a mess, that is going to another video for me. I'm curious, what is the new 5th wheel that you bought?

[@alanshaw4655]

you save your tech money, learn how to fix problems on your own.

[@georgekatsinis5224]

Name of manufacturer? Help us all out.

[@leonardcole5095]

What is the proper repair method if you have this configuration and get a leak?

[@coreyingram947]

Thanks for the video. We have a 2022 Jayco 264BH. It has flexible tubing in places connected with PEX clamps. 2nd trip out the line into the water heater blew off but it was clamped on the ridge of the barb. Glad I was standing next to the trailer when it happened. Will certainly keep an eye on all the other areas for leaks. Great information!!!

[@undercoverrvtech]

Yikes! Yeah I really want manufacturers to stop this.

[@szinski]

On several FB groups, people recommend removing the PEX compression clamps and using worm gear clamps (automotive hose clamps) instead. Is this a suitable fix even though they still use the original PEX fittings? If not, what's the best way to correct this problem? My 2021 Flagstaff is plumbed this way and I'd like to take preventative action and fix it properly.

[@richvanevery3]

Well done. You are THE MAN. I want to know about proper ratchet fittings for PEG not the crimp ring (destined to fail) approach.

[@Garagemonkey11575]

My 2017 forest river 29 RKP had the same problem I do believe my pipes froze even though I blew the water out I would guess there’s water between the fittings that freezes and expands the hoses on these cheap nylon hoses. I repaired it myself and then use a antifreeze and it’s not leaking so far so what you said is right

[@BradlyFackrell]

Do you have any suggestions as to how to connect to the vinyl pipping? I have runs of vinyl that go the length of my RV, and I can't replace all of it, but I need to repair leaks(s) where they connect to the PEX at the water control panel.

[@michaelp9137]

I had an improperly installed air admittance valve that was for my black tank flush, it was a cheap plastic valve that had terrible ratings when you looked up the part number. Was in a spot that was hard to find and the only way I knew something was wrong is when I did use the black tank flush, water would come out from under my sons bunk and flood the floor. Took out the valve, hard connected the piping from the flush tank port to the tank (bypassing the AAV) and installed a vacuum breaker on the outside where my hose connects to the rig. Fixed the leak and still have a vacuum breaker to prevent backwash into the clean water. A brass Valve would of saved me hours of cutting the wall out behind my shower to find the AAV, but plastic is cheap.. cheers!

[@undercoverrvtech]

Yes I've run unto that problem. I agree that an external vacuum breaker is a better design.

[@health101DOTorg]

Jacob, thanks! The travel trailer I want DOES have a T fitting with both PEX and FLEX. I will replace the FLEX with PEX.

[@harley2004flh]

Love this 2023 KZ sportsman you hit it right on I have leak like that under the bathroom sink I tightened the Faust hookups still Leak's you're experience helps thanks

[@hillcountrygarage]

I've actually seen that on RV's but just assumed it was OK because the manufacturer installed it that way. What a revelation. Yeah, I'll be voting with "the golden rule" with my next RV purchase.

[@undercoverrvtech]

Yeah, I don't know why this is being done, it actually goes against the code that is supposed to govern RV plumbing. The RVIA is supposed to be enforcing that code, so my conclusion is that the RVIA seal on an RV is a joke.

[@mattwaters6987]

I really enjoyed and appreciated this video. Decided to sub. Looking forward to more great videos on your channel. 😊

[@undercoverrvtech]

Thanks for watching! Glad the video was helpful!

[@sarahmcarthur9107]

So in watching through this a couple of times we still weren't clear what to look for in the difference between the outside appearance of the fittings. We just bought a new fifth-wheel and we'd like to be able to know what to look for while it's still under warranty. It may not make a difference, as there may not be a problem yet, but we'd like to at least be able to complain to the company if there is a problem (and change it out ourselves if necessary to prevent one). Thanks for some very helpful information!

[@danieljohnston5306]

Not only that, they know that it won’t fail until after your warranty is over and/or they have rebranded under a new company name and are no longer required to honor the old brand name warranties.

[@user-zo5rq4wd5w]

Pex pipe has been an issue since it came to market. I’ve personally seen whole homes ruined do to pex not crimped correctly. I replaced all fitting with good old screw downs never a problem. Always turn off water at camp site when leaving

[@ionfreefly]

What kind of clamp do you recommend on the hose fittings?

[@scottbyers226]

had 2 leaks in our water distribution area. one from city water connection, one on outlet of filter. Both due to this issue. I found that upgrading to brass the 1/2" pex clamp wouldnt fit over hose and 3/4" wouldn't clamp tight. Had to swicth to a screw type hose clamp. However on filter the flexible vinyl wouldnt clamp tight because diameter of filter was less than 1/2". So the pex clamp was the only way to get sealed. Very frustrating process with the only solution seeming to retro everything to pex

[@moonchildani]

So I’m a gal who couldn’t afford a rv loan but had saved for a used one ~ ok no negatives I’ve been reamed already ~ believed the seller when said everything works except the fridge , even the ad stated so; well yep turns out really only the AC/Heater works, so far that I know of. The shop review stopped when they realized I didn’t have another 8K they wanted to reseal the roof, fix a few outside lights, step and advised the water lines have been leaking- they said because rodents ate the lines. So truth the rv had prior leaks and roof patched and there is inside paneling that needs replaced but it’s really solid. So hoping I can do some of the replacements myself ~ water lines is a definite as bathroom shower and toilet / sink are fine - kitchen sink fine. Etc ~ I’m going to get another shops opinion as well. I see products for sealing the roof and other seals so hopefully about that . PS it’s a 80’s American Clipper

[@user-mj6fe5jf9z]

I just went to look at a 2024 Grand Design and everywhere I looked there was vinyl flex pipe into pex fitting with pex clamps. I walked away. I have a 2010 Rockwood mini light and the trailer is plumbed correctly except for 2 fittings at the water pump. They have never leaked and I'm going to fix them soon.

[@coffey2go313]

I could use your advice. I have a leak where had pex goes to soft pex. I need to know if there is a best way to get to it. We have a Grand Design Momentum 397Th. The leak is where the had pex goes to soft then to the washer connection. Thxs. Great videos and advice

[@christopherpage3177]

My Forest River had that junk and it leaked, I ended up putting in a warranty claim to have all the plumbing done with only pex. They build rv's like crap and ask the moon for them. Awesome video, I subsribed.

[@displacedtexan]

If you have these incorrect connections, what’s the best method for fixing? Can we change out the connection for something better like a worm drive, or is there a way to change it to a barbed connection?

[@SaltyVetAdventures]

These manufactures need to be sued for how badly these are made. I am not litigious but sometimes that is the only way to get their attention. These things are made so poorly it is ridiculous.

[@undercoverrvtech]

I'm not sure which would be more effective, that or educating people so they can stop buying RV's with these types of problems.

[@SaltyVetAdventures]

@@undercoverrvtech I agree it would be awesome for people to not buy crappy RVs..but, that means everyone would have to stop RVing because that are all crappy. Following plumbing and electrical codes should be a no brainer safety issue.

[@bobmariano3731]

Start naming names , enough of the talk . . Screw these manufacturers, until they are called out & publicized they aren’t going to change . 👍🤛

[@SaltyVetAdventures]

@@bobmariano3731 true… but all that would entail is a list of all the manufacturers.

[@michaelhall8529]

@@SaltyVetAdventures Not all. My 2019 Newmar motorhome is PEX throughout (except where it's not needed - between the foot valve and the toilet itself - no possible pressure build-up).

[@ronmucci3331]

Hi Jason, thanks for great stuff, hey, could you recommend a couple of Class C's that have good plumbing.....thanks Ron

[@jerrytalley802]

What brand makes a travel trailer with the correct plumbing and quality cabinets, countertops, best slide mechanism, good roof, good fridge, good AC, good water heater, good frames, etc. all this without being unaffordable? Thanks

[@wercruising]

Just stumbled on this video, I liked and subscribed. Great topic, 2021 vanleigh Vilano, msrp 109k, 70 percent of the plumbing was with the flexible junk, I spent 2 half days replacing with pex, no more leaks. Good point on parks with higher pressure than others, that’s when it leaked the most. Not a fan of pressure regulators, I like a good strong water pressure, especially for the shower.

[@undercoverrvtech]

Another consequence of high pressure on your system is water pump check valve failure. I see this problem a lot. Symptoms include fresh water tank filling and overflowing while connected to city water, or the pump running but not building any pressure. I've have many clients panic because they could not winterize before an impending cold snap due to this problem. You could install a valve to cut off the pump from high back pressure to prevent this. RV's are not equipped with a valve like this because it is expected that you use a regulator.

[@rossbagley9015]

@@undercoverrvtech the pump check valve was causing my tank to fill and overflow while connected to city water? The issue "fixed" itself and we continued our trip without seeing it again, but I've been worried about a repeat that I didn't know what might be going on or how to fix it. Looks like I'm installing a new pump this weekend.

[@undercoverrvtech]

You can also get a check valve kit for like 15 bucks. Much cheaper than a new pump. Sorry I didn't see your response sooner!

[@StevenTanner-oh2ef]

I have only found one piece of that trash tubing in my RV. It run from my freshwater tank to my pump. Glad it’s on the suction side not the pressure side

[@undercoverrvtech]

Yes, on the suction side the worst case is your pump struggles to build pressure, but you won't see leaks from it.

[@richardkoch8752]

I'm still learning and processing information before buying a travel trailer. Been at it for three years now! I'm retired with plenty of time, love to tinker. I was thinking "oh well, I'll just have fun replacing vinyl with pex" But then, I realized; how much cheap vinyl might be hiding that I can't get to? Not good!

[@undercoverrvtech]

Exactly! Ripping out the underbelly and tanks to get at a fitting is a lot of work...

[@brianhilligoss]

I’m glad my rv doesn’t use this connection. Unfortunately they used cheap plastic pex fittings that all failed between year 2 and 3. We purchased a huge fitting kit and replaced every fitting.

[@azpete6436]

OK, Forest River fails the plumbing test by using pex fittings and oetiker clamps on vinyl tubing. I have fought the leaks for years, finally trying screw hose clamps as a better solution. What I am going to try now is to heat the pex and slide it onto a 1/2" barb fitting which will then be connected to the vinyl tubing. Wish me luck,

[@jefflozes8785]

Thanks for your videos. We are in the market for a travel trailer and find your info important. We can't wait for the list video.

[@johnfeaster9472]

Were getting ready to purchase a jayco pinnacle thank you ill look for this they say its pex plumbing

[@johnstangel8918]

Thanks Jacob I really appreciate your help.

[@undercoverrvtech]

Happy to help!

[@barrymarootner504]

I love my 1995 Monaco dynasty. Back when they built RV’s to last many many years.

[@undercoverrvtech]

I had a 1999 Harney Coachworks Renegade... I miss it!

[@amy1502]

Thank you for this video!! As @rdance3 mentioned - would you consider doing a video on fixing this issue - swapping it out. Our 2022 Storyteller Overland Stealth mode has had several leaking problems - we just thought from rough roads and vibration. We recently took it out in freezing temps (supposed to be 4 season) and in the particular box where the plumbing connections are, it froze - though the rest of the van and water tanks were fine. That caused the lines to swell and ALL the clamps to loosen. My husband has had a heck of a time replacing the clamps with the kind that you use a screwdriver to tighten. Unfortunately many of them are still leaking and we are wondering if there is damage to the hoses or what. Trying to figure out the best path forward and how much we need to replace down there. lines? clamps? connectors? A video helping with how to correct the problem would be much appreciated.

[@WayneWilliams-c2t]

Hi Jacob, great video. Really appreciate your expertise. I have a 2023 Reflection and we used it a lot our first summer with no issues. However I have been reading all the horror stories and want to do some upgrade in the spring on this topic. In the event that I don't remove and replumb all the flex pipping to PEX, what would you recommend for the replacement of the PEX crimp on the flex line to the copper PEX fitting? Would a standard metal screw tight plumbing clamp be the best choice? I would appreciate your wisdom. Thanks, Wayne

[@michelleholman5103]

My 2024 Flagstaff Micro has this exact issue. Had two leaks the first month! Not sure they even tested the dang thing.

[@tedcolclazier8126]

I’m new to your channel. But I have had water problems in my Grand Design . Because of in proper pex connections caused junction leaks. Yes I used Grand design name. Not the only poor assembly I have had.

[@jeffreytull5767]

I appreciate the video... Tips #1 and #2 are good for those of us with an RV, but you didn't advise for or against proactively redoing the plumbing. My take away is that I should find all vinyl tubing, trace it to it's fitting, and redo if it's attached to a pex joint. Correct?

[@undercoverrvtech]

If you uave the skills to remove vynil tubing and replace with PEX, that is what I would do. My primary goal with this video is to educate people so they can stop buying these problematic RVs and hopefully manufacturers will get the message and stop doing plumbing improperly. Thanks for watching!

[@jeffreytull5767]

@@undercoverrvtech Does the vinyl need to be completely removed? Can the vinyl be cut a couple feet back, crimp pex onto the joint, then couple the vinyl to the pex? I agree that I would not tackle this if I didn't feel I could do it right, but if I have to hire it out I'd like to know my options.

[@undercoverrvtech]

What you described would create more leaky joints. I only reccomend using flexible tubing if it is a pre-made assembly like I was showing in the video. So unfortunately a proper repair requires removing all the flex tubing that was cut to length and attached to PEX fittings and replacing with PEX, or installing a PEX to 1/2mnpt adapter so that a pre-made flex hose assembly can be attached.

[@matthewford8857]

@@undercoverrvtech this is correct. I'm a plumber and proud first time owner of a new leaky rv. I appreciate the video as confirmation for what i discovered. Now i have to tear this thing apart and fix it cause it is my home and i can't have it at a shop for 6 months. can't trust a single connection now.

[@Robnord1]

Great video on this topic! 26 year tech and mobile RV repair pro. Subscribed Have you tried one of the Ryobi SS pinch clamp battery operated tools? I'm thinking of getting one for tight quarters jobs, and Ryobi is the only offering so far.

[@1hasbeen531]

Have you inspected an ATC fifth wheel toy hauler? I saw a short video of their wet bay, and it looked like there were numerous incorrect flex to Pex transitions.

[@brianfoster7486]

Can this be modified at the point of connection? If you see the flex pipe with a pex connector? In other words, can you remedy this without replacing the entire line? And just replace at the connection point? Thanks - good video. 👍

[@undercoverrvtech]

This playlist has 3 videos showing ways to fix this bad plumbing. #2 and #3 show ways to transition from flex to PEX. kzbin.info/aero/PLRhkJB7TNcSn2U5sDy5ic2iWr8kFxxd_N

[@jimroberts1391]

I found 6 leaks in my grand design solitude / I am going to start switching it all out with pex

[@garycramer3768]

Where can I purchase the correct rv rubber hose connectors ?? Possibly a link or Amazon description, thanks

[@dahof2789]

I just bought an '05 RV that has all PEX plumbing. Did they install PEX in '05 or has it been retrofitted?

[@robtrenholm6239]

Thank you for the informative video! Does Keystone plumb their trailers correctly?

[@BPzeropoint]

So odds are if I have a leak it is due to these connections and tubing in your opinion? Do you think I should use a food color for a dye that I can see more easily where the leak is exactly coming from?

[@carperdiem8754]

Have a leak in my 2014 Dutchman Denali. Getting to it will be a pain in the ass

[@windellstephens9359]

Good info! I'm glad you mentioned the pressure issue. We are on our fourth RV, currently a 2017 Class A and have always used a water pressure regulator which I set at 40-42psi. I use an adjustable regulator with a built in gauge as I believe the ones you show are simply restrictors not regulators. Being on several social media camping related sites I've come to the conclusion that a heckuva lot of leaks are self induced. I don't understand the obsession with high water pressure, what does it prove?

[@rossbagley9015]

They're pressure regulators. I tested this using one of the adjustable regulators and its gauge. My house has 100psi water. I set the adjustable regulator to 80psi and then put it downstream of several non-adjustable regulators. I had one from camco and a few other no-name ones I bought off amazon. They all regulated the water pressure well below 80psi. Some were 50psi, some 40-ish, one 35. But all regulated the pressure, not just flow rate.

[@timgarcia6271]

I just recently bought a sunray 139T made by Sunset trailers. On my first boondocking trip I noticed a water leak on a line that led to the outdoor shower. When I got home I took it to the dealership with a punch list. After watching the plumbing video, I checked the video I took of my leak and sure enough I have the flex tube on a pecs fitting. What can I do about it? It’s not the dealers fault. How can I DIY a solution? Maybe a video from you covering that? Just subscribed so I’ll be watching.

[@undercoverrvtech]

Yes, I plan to make a video about a fix for this problem. I really want manufacturers to stop it, but that does not help the hundreds of thousands of people like yourself who already have a camper with faulty plumbing.

[@markcarl8476]

Where do you get these fittings? I have been to Lowes, Plumbing suppy, Ace.....? Please help.

[@JamesSchwind]

Hi Jacob, I am a new subscriber and plan on getting back in to RVing after 20 years. I have been looking at two possible travel trailers to get started. One is the Grand Design Momentum 21-G toy hauler, and the other is either the Terra, or the new O-V-R from InTech. Have you reviewed either trailer recently? I really like your honest, no-nonsense approach to your videos.

[@ForgeAheadwithMike]

I was waiting for a mention of where we can find these flex-tube fittings you showed with the rubber O-ring (I've never seen one before). I searched everywhere but can't find it. Could you post a link?

[@dennisg.7498]

I have had at least 10 fitting leaks on my 2022 RV.. The issue is, the pex itself. Draw a short line with a sharpie on the pex pipe by the fitting at the connection to a faucet. Then hand tighten the nut on the fitting. You will see the line/pipe rotating with the fitting nut. This is because the seal sticks to the pex, turning it with the nut. PEX tubing does not like being rotated, so it will unwind the pipe and also loosen the fitting you just tightened. The solution is to hold the pipe with one hand, then tighten the nut with the other. This keeps the pex pipe from twisting with the fitting nut.

[@mmmd3429]

A link to the fittings would be great!

[@DeanBostic-z2u]

I understand you shouldn't use pex within 18" of a water heater. My water heater has a Tiara ROC Water Heater by-Pass hose Assembly where both bypass valves screw directly onto the tank and have integrated pex-style male connections for the blue & red lines. However, Winnebago has inserted about 18" of flex tubing between the pex and the bypass assembly. Should I remove the flex and connect the pex directly to the bypass assembly? Or maintain the 18" separation between the tank and the pex?

[@tkilg7169]

So, what clamps should be used on flex hose with barbed fittings? Pinch clamp like pex uses? or hose clamps? or what?

[@undercoverrvtech]

You actually can't fit a pinch clamp over flex hose once it stretches over a hose barb, so screw type hose clamps are fine. I'll cover this in the next video.

[@tkilg7169]

I should have thought of that, because a barb fitting is larger in diameter than a pex fitting. The flex hose in my camper is clamped with pex pinch clamps, but it is clamped down on pex fittings. I am in the process of correcting some of those connections presently. Thanks to your video. One other question, would you recommend pex A in an RV, and is it ok to connect pex A with sharkbite fittings and crimp clamps on pex B fittings?

[@undercoverrvtech]

I would only use PEX A if using PEX A fittings. It would be a great way to plumb an RV, but I don't recommend installing PEX A on a PEX B fitting. A PTC fitting like SharkBite can work on both if installed correctly, I don't recommend them as I've had the o-ring inside get damaged during install and create leaks. If installed correctly they are fine but are more difficult to install than PEX B tubing, fittings and cinch clamps in my opinion. @@tkilg7169

[@angelahawke-intherocketcity]

Where can I buy new washer fittings for my fifth wheel? It’s a a 2021 Salem Hemisphere.

[@brendadoyle580]

Thanks Jacob! Fantastic video.