Replacing Our RV Toilet | Dometic 310 Toilet Review

[@LostandFoundTravel]

Thanks for the vid. I work at Dometic - I'm currently working with a 3D artist to do some toilet feature videos. He needed a sample video of a 310 flushing to match the vortex in the animation. You just saved me a hour of setting up a dummy toilet in a warehouse so I could film the swirl. Thanks 10X!

[@JouppiOutdoors]

Awesome, glad it helped you out! Thanks for watching!

[@christinaholligan8299]

Do I have to have a special kit or something to go from a thetford 42050 and to a dometic 310

[@JouppiOutdoors]

No, the flange is the same for both models. Thanks for watching!

[@gary724]

A Sharkbite elbow would relieve the stress on that PEX where the manufacturer over-bent it and also add just enough to the total length. Adding a shutoff valve is also a great idea.

[@JouppiOutdoors]

Absolutely correct! Definitely should have went that route. Thanks for watching!

[@christinaholligan8299]

I took thetford apart today to replace it. I found it Just needed to be cleaned. So I cleaned it and then put it back and it works just fine.

[@JouppiOutdoors]

Awesome! Glad it worked out for you!

[@ericsalkeld7146]

If you had cut the pex line and installed a shutoff valve you would have easily solved your length problem and added the extra security of having a shut off. By leaning on the toilet with your chest on the toilet and your body weight compressing the rubber seal tightening the nuts is quite easy.

[@JouppiOutdoors]

Great point! If I remove the line I’ll probably add a valve at that point. Thanks for the feedback and thanks for watching!

[@dodyhopper4394]

Agree with the shut off valve did that,mainly for cleaning. But had to replace the flush valve actuator lever made it so much easier 1/4 turn water off gonna add the shut off valves to both sinks on the to do list 😀

[@JouppiOutdoors]

It’s a really good idea, I’ll probably add that to my list as well! Thanks for watching!

[@robaskim5086]

Just replaced the same Telford with a 310 today! And now I see your video 😂. I had to cut an inch off the flex pipe (Jayco 28RKS). I was surprised how much water kept flowing in after the flush and remained in the bowl. Great video - Tanks! BZ

[@JouppiOutdoors]

We were surprised by the amount of water after the flush as well. We were adding a little extra water out of habit, which is not necessary with this model. Thanks for watching!

[@kathleenrutherford733]

I watched another video The guy used a SharkBite push on 1/2 inch X 1/2 inch faucet 20" shut off valve to eliminate future issues if you need to shut off the toilet for boondocking or trouble!

[@JouppiOutdoors]

I have seen that method using the sharkbite fittings as well. I would definitely do that if I ever have to unhook the water line again. Thanks for watching!

[@LivingtheSilverLife]

Good review and installation.

[@JouppiOutdoors]

Thank you and thanks for watching!

[@ripshift93]

Great video, thank you.

[@JouppiOutdoors]

You’re welcome, thanks for watching!

[@255-southcarolina8]

Appreciate the information will check the measurements my toilet flush went out to going for the Dometic 310

[@JouppiOutdoors]

You’re welcome, glad the video was helpful! We have been happy with ours so far, thanks for watching!

[@eyotachenoa3132]

Been living in our 5th wheel for 7 1/2 yrs. Thetford has always fine but had a miner problem. Dog hair built up in the pedal, lol. GSD's! Working fine since. Thetford makes Dometic.

[@gonebyrv9748]

Thetford does not make Dometic toilets.

[@eyotachenoa3132]

@@gonebyrv9748 , research it yourself. They are 1 in the same.

[@gonebyrv9748]

@@eyotachenoa3132 you might be confusing Sealand toilets and Dometic. Dometic acquired Sealand in 2002 and began selling them under the Dometic name in 2017. Thetford is its' own company and is HQ'd in Michigan. Show me why you think they are both made by Thetford.

[@eyotachenoa3132]

@@gonebyrv9748 , don't know anything about Sealnd. All our research show that Dometic was originally Thetford. We spent some days making sure of what we wanted. Our manual instructions on our Thetford had Domestic on it as well as Thetford. I know what we have & what we purchased.

[@annieyahu676]

Thank you for Sharing ❤️

[@JouppiOutdoors]

You’re welcome and thank you for watching!

[@robertkaplan6600]

Been there ...It blew the spring and the handle. We liked the Dometic better.

[@JouppiOutdoors]

Our spring flew off also, I actually got it back on (eventually) but the pedal would fly off every 2nd or 3rd flush. Glad we did this before getting back on the road!

[@hardtruth2039]

We are looking at the 320 elongated bowl. We like the bowl and rim flush design better than the 310. But I will be closely checking the dimensions now that you mentioned that it would be a tight fit. I picked up five 1/2” stainless steel braided supply lines with a shark bite valve on it. I installed them at the kitchen and bathroom sinks and the toilet. Sharbite valve made it easy to install and hook to the toilet. Now I can isolate the water to the sinks and toilet if there is a problem.

[@JouppiOutdoors]

We would have preferred the 320 but it was just too close to chance it. Thanks for watching!

[@002seleena]

Recommended

[@JouppiOutdoors]

Thanks for watching!

[@MidLifeJourney]

We seem to have similar issues with our Grand Design! I was thinking about replacing parts on mine and "rebuilding" it but I may go ahead and replace it now. I also have an issue with the black tank valve not closing all the way. I need to check into that problem soon but for now I have a valve on the outside to close it off. Thanks for all the informative videos you put out! It really helps me as I am not as handy as you are.

[@JouppiOutdoors]

It was a super easy swap and much better than the Thetford. We had the same issue with the black tank valve and added the secondary valve. I think debris was caught in the valve, but it eventually cleared and closes properly now. Thanks for watching!

[@MidLifeJourney]

@@JouppiOutdoors did the new Dometic toilet come with a seal for the bottom?

[@JouppiOutdoors]

Yes it did!

[@MidLifeJourney]

@@JouppiOutdoors Do you think the 320 would have fit?

[@JouppiOutdoors]

I didn’t measure it but the 310 is pretty close to the back wall so I don’t think the 320 would have fit in ours.

[@breaking_bear]

Hahahahahahah! My wife and I are cracking up from the sound of that toilet flush. She was just about to fall asleep when the toilet flushed and she laughed herself awake! Too good! On a serious note: whats the dometic toilet made of? Plastic, porcelain, or whoopie cushion?

[@JouppiOutdoors]

Glad you enjoyed that! Lol. It’s a porcelain toilet. Thanks for watching!

[@johnhestand5817]

Is it holding or leaking water in bowl?

[@JouppiOutdoors]

It’s good to go, no issues!

[@ClintMyhre]

As others have pointed out, the Dometic's insides are basically a leak waiting to happen. The Thetford inside is a much better design for the seal between the bowl and the base. I could share pictures of the Dometic insides, but there's a bit of poop in there. I'm seriously thinking of replacing my Dometic 310 with a Thetford. You could also replace just the base with a toilet that has the problem you described. After a year, is your Dometic leaking? When it leaks from the seal between the bowl and the base, it will look like the floor seal might be leaking, but when you remove the toilet and tip it over, you can see a drip line coming from one of the holes in the base where water has collected between the bowl and the base. It's a horrible design in the Dometic. By the way, you clearly had an inch to spare and could have gone with the 320, but it may have the same leakage issues. Good luck!

[@christinaholligan8299]

We want to change just like you did. But they told us we had to have a special adaper kit. Is that true? We have a thetford 42050 and want a 310

[@JouppiOutdoors]

Were they referring to an adapter to hook up the water line perhaps? The flange to bolt it to the floor should be the same.

[@clintonwilliams5571]

Have you had any problems with it yet? I seen in reviews that they break easy and leak. Also they don't seal well so it stinks up your rv.

[@JouppiOutdoors]

Ours it still performing well, no issues!

[@dougszymaniak4017]

I would have cut a valve in for when that valve on the toilet goes bad. You could just cut the water off to the toilet and not worry about cutting the water off to the whole camper.

[@JouppiOutdoors]

That would have been a great idea. It would also have helped extend the hose that was barely long enough. Thanks for watching!

[@inmyimage1081]

We have that same Thetford Style II toilet and starting to have problems with it. One thing that seems to be a closely guarded secret in the RV toilet industry is bowl depth 🤬 How would you compare the depth of the 310 to the Thetford? We actually have room for the 320 so would appreciate if you were able to find anything comparing it’s bowl depth to either the 310 or the Thetford Style II.

[@JouppiOutdoors]

The bowl depth on the 310 is deeper than the Thetford. If you have room for the 320, I would recommend going with it. The 320 is very similar to a residential style bowl. It was too close to chance going with the 320 in our rig and we are happy with the 310. Thanks for watching!

[@inmyimage1081]

@@JouppiOutdoors Thanks, it’s so hard to find a variety of the things in a store and without the info it’s a real crap shoot 🤪

[@catskinner7564]

I'm doing the exact same thing getting rid of the two toilets that are in my trailer and replacing with the 310 try to find parts for the other one sold out everywhere part number 42048 good luck finding it

[@JarheadAndGingersJourney]

Great share! Ginger hates cleaning the toilet in our Grand Design Momentum 397th because of the craziness under the seat. Soft close is great too! Is it all plastic or plastic and porcelain?

[@JouppiOutdoors]

Definitely not a fun topic to cover, but it’s all part of living this lifestyle! The bowl is porcelain with a plastic base. Thanks for watching!

[@simaii820]

Anyone having issues with it clogging up and not flushing? The ball gravity hole looks so small

[@JouppiOutdoors]

The key is to use plenty of water. We have had no issues so far! Thanks watching!

[@6582rg]

Are you still satisfied with the Dometic 310? If you could, would you chose the 320? Thanks! DJ

[@JouppiOutdoors]

The 310 has been great! I originally wanted the 320 due to being a more residential design but we were tight on space. The 320 is a little longer due to the more oval shape. Thanks for watching!

[@6582rg]

@@JouppiOutdoors Okay. Thanks for the quick response. The 310 it is. DJ

[@JouppiOutdoors]

You’re welcome!

[@bond008a9]

I am swapping a Thetford Aqua V to a Dometic 310. Anyone know what size fitting/flexhose I need to hook up to water supply to new Dometic 310? Thx

[@JouppiOutdoors]

The hose going to the toilet is 1/2” pex tubing on our 28bh. If you just need a little added length to make it reach, you can add a 1/2” sharkbite shut off valve, that should extend the hose enough to reach.

[@thewoodengnoem]

What pex fitting did you use to hook up the water supple?

[@JouppiOutdoors]

I used the same fitting that was on the old toilet.

[@timgreenway5325]

No seal between floor and toilet????

[@JouppiOutdoors]

The new seal was already on the toilet. I should have mentioned that! Thanks for watching!

[@davidarmstrong2503]

Putting in a new toilet. Do I need to use pipe tape on fitting going into toilet. Sorry dumb question Iam not a plumber just ask my wife.

[@JouppiOutdoors]

Pipe tape should not be necessary. Thanks for watching!

[@osvaldotrevino1991]

Did you measure the center of drain to your wall? Im wondering if i can replace my model 300 with this one..

[@JouppiOutdoors]

I made a rough measurement before removing the old toilet. The Amazon listing had all of the required measurements for the 310 and 320 in the listings. Maybe you could compare the measurements of the 300 to the 310? I don’t recall the measurements off hand. Thanks for watching!

[@osvaldotrevino1991]

@@JouppiOutdoors thanks ill check that out

[@KJRitch]

How has your Dometic 310 held up so far?

[@JouppiOutdoors]

So far so good! We learned you have to be careful when cleaning with a toilet brush. If you clean it with the flush valve open you can slightly dislodge the seal and the bowl won’t hold water. Dometic has a procedure to reseat the seal which was super easy. We still use a brush to clean it but do so with the flush valve closed. Other than that, no issues! Thanks for watching!

[@revelleapgar5714]

Don't take a 320 apart

[@JouppiOutdoors]

I have heard that from a few people now. Thanks for the info!

[@raven7068]

I bought me a domestic 310 for my motorhome it was the worst upgrade I've ever did! No flashing power even though I had good water pressure in my coach, The flashing ball constantly got jammed twice over field may black tank into the coach. And 3rd if your a guy the Around China bowl aren't the best for us, The Elongated Bowl is the only one that is good. Again my personal experience the Dematic so called upgrade is a downgrade!

[@JouppiOutdoors]

We would have definitely went for the 320 if it would have fit. Thanks for watching!

[@tonygonzales8729]

That new toilet you put in is Garbage!!! The seal in between the base and the bowl leeks and you’ll start smelling pee. I’ve had mine replaced by the manufacturer and the dealership I got it from. Now the second one is doing the same thing. I’m getting a different brand

[@JouppiOutdoors]

Thanks for the heads up, I’ll definitely keep an eye on that! Thanks for watching!

[@gonebyrv9748]

@@JouppiOutdoors We changed out a Thetford Aqua Magic IV and went with the Dometic 320. I had replaced the water inlet valve on the Thetford 3 times and the ball valve seal once. I decided that was enough. After using the Dometic 320 for 2 1/2 years (we are FTers) I finally had to replace the ball valve seal on the Dometic. MUCH easier than on the Thetford. I think you made a wise choice going with the Dometic.

[@6582rg]

@@gonebyrv9748 How do you like the 320 versus the 310. I’m trying to make up my mind.

[@gonebyrv9748]

@@6582rg I've never had the 310, so I can't respond to your question. I do like the 320 vs. the Thetford we had before.

[@ClintMyhre]

@tonygonzales8729 which toilet did you end up with? My Dometic 310 (original to my trailer) clearly has the same issue you describe.

[@sandracarbajal1528]

Talk too much get to the point of showing how to change toilet!

[@JouppiOutdoors]

Noted, thanks for the feedback and thank you for watching!

[@KJC63]

agree with @ericsalkeld7146

[@JouppiOutdoors]

Thanks for watching!