BOLTR: Diaphragm Pump | So tough it'll pump ball bearings

[@abelincoln95]

We had some little units by the name of PIAB. The head engineer of the plant "outlawed" them because of their high air consumption. But, every good mechanic had one stashed away. Saved many a shift due to failed vacuum pumps that were not in stock in the storeroom....

[@arduinoversusevil2025]

I always take an hour or two to enjoy those teachable moments...

[@casillas949]

A peristaltic pump is a great alternative. Handles scurries and is much more efficient, using an AC motor.

[@Mk47Ultra]

AvE show us around your haas, did you buy it, is it used or new? is it a VM2 by the looks of the table? so many questions. are you running it on 3 phase or have a converter.

[@MikeCookie1973]

casillas949 peristaltic pumps have some pressure limitations though (and electric motors in class 1 div 1 hazardous areas are spendy (as are the VFDs).

[@captianmorgan7627]

Just don't but the cheap pumps, they fail too fast to justify their cheapness. casillas949 peri pumps are nice but really have a different application. If nothing else the flow through a peri pump is much less than that through a diaphragm pump (at least the ones I use), though much more adjustable and a bit smoother output.

[@jasonvanhalle]

As a 300lb Dutch Boy, I take offence at the insinuation that we over-tighten things - everyone else just leaves everything loose all the time.

[@grumpytanker8258]

Jason VanHalle lol shots fired

[@rcmadness13]

Haha, I used to have a bad habit breaking/stripping bolts. After maaaannyy extractions and hours of beating my hands up, I learned to just give it enough. Go back threw when your finished and give everything a kiss of the wench while looking for leaks save a lot of time.

[@matthewcadden3962]

Please use your talents to torque every “self-loosening” cv axle nut in the world!

[@matthewmeuleman3369]

You want it tight like a tiger, not loose as a goose.

[@skycorrigan6511]

As a 90 lb Filipino boy I've been offended way before you.

[@bluekouki86]

Nothing puts this millwright to sleep like the distant sound of a chorus of diaphragm pumps from the comfort of my breakroom.

[@brokenacoustic]

"For a certain stroke you get a specific amount of fluid out the outlet" holy crap, I'm a positive displacement pump!!

[@PyroShim]

Needs a lot of priming though...

[@brokenacoustic]

@@PyroShim yeah but my priming bulb is huge lol

[@cobolt13]

RocketSurgeon sounds like you've removed the gasket that goes around the pump. Because of this you'll need to pump 5 times as long

[@brokenacoustic]

@RocketSurgeon An o-ring definitely sounds safer than a snap ring...

[@brokenacoustic]

@@cobolt13 if you remove that gasket, you run the risk of making a tiny pump that cries a lot!

[@giraffewithtattoos2770]

I worked in a cotton processing plant that turned threads from blue Jean manufacturing, raw cotton, cotton mop off cuts, and assorted fibers into fire barriers for mattresses and furniture. We used diaphragm pumps to move cottonseed oil to the sprayer heads. If you've ever wondered how they make cotton fire resistant, cottonseed oil is the glue and powdered boric acid run through a hammer mill is what does the grunt of the fire resisting.

[@Laubauskas]

The word is "brunt" not "grunt"...unless you really can use grunt in that way and im just a retarded literary nazi

[@dealeru.3532]

They used about a 20" diameter one of these to pump out the oil sump under the grate floor of the truck service trench in an Australian mine I used to work at. The evil beast didn't like the shop rags that the open ended ~ 2 1/2 inch suction hose used to pick up, but it kept the 300 lb Dutch apprentice busy for a couple hours at a time rebuilding the thing every other day... until I gutted an air filter and secured the mesh screen around the intake end of the hose. Boy did I catch hell for destroying the air filter with it's $20 core charge, let alone making them have to find something else for the apprentice to do :-0

[@andrewdow1609]

Be EXTREMELY careful blowing out a diaphragm, as you might get an unexpected delivery a short time later.

[@killaklownen]

Watching on lunch break after having trouble with a diaphragm pump in the iron foundry 👍

[@Donnyf3841]

I work in a pottery and we use hundreds of diaphragm pumps. The liquid clay (slip) is pumped through these all day everyday. These pumps are tough. Because slip is basically liquid sandpaper.

[@whssem4793]

That's one big Capri Sun..

[@andrejwalilko634]

i was hoping for astronaut ice cream

[@crazyguy32100]

We use dozens of Yamada pumps, everything from coolant to lube oil to waste water. Bet one of the apprentices a 6 pack I could replace the diaphragms and check balls blindfolded. He gave me Keystone Light, a sad state when our apprentices aren't paid enough to buy real beer.

[@__WJK__]

Those young apprentices know a thing or two about quantity over quality!

[@ShainAndrews]

If you were blindfolded how did you know it was Keystone...

[@peterg.8245]

From the vomit 🤮

[@Waffle675]

Nah, we get paid enough we just don’t drink that over priced microbrew crap.

[@jballew2239]

Chances are your apprentice would not know a real beer if it bit him.

[@AuDHDQ]

I've been watching this channel too long; I actually understand what he's saying.

[@jameshilferty5403]

TOO CLEAN!!!!!! IMPOSTER!!!!!

[@SuperKingslaw]

I think the Chickadee is achieving what his mother and wife did not.

[@rojinphilip2909]

6 days ago?

[@squarecoffee8750]

@@rojinphilip2909 patreon ??

[@CultoftheCC]

@@rojinphilip2909 Patreon I guess. I think he releases them 1 week early to patrean subscribers. If you check the patreon page there seems to be two videos non subs can't see yet. Not sure how that works though because it is weird seeing comments from 6 days ago when the published date clearly says "Nov 1, 2018".

[@jameshilferty5403]

@@rojinphilip2909 bonus nachos

[@ianholland212]

This is one of those tools you pull out when someone says how are we gonna do that and your like don't worry I got this

[@bittkerj]

Ive been questioning the simplicity of these pumps for 3 years. One day I'll stop doing that... Pro tip: when you don't feel like taking the pump apart to pump more used oil give her a couple love taps. Works like a charm

[@livelife441]

These pumps are fantastic! Have seen them used on drilling rigs and as trash pumps for dewatering excavations for water main repairs! They are cool af and way more durable than centrifugal pumps! two thumbs up! Also, I love free stuff!

[@ryanwarunek8385]

Im glad you clarified the need to ground it when using in an explosive environment. Used to use these all the time in my building's fuel room for pumping salvage and waste fuel

[@WombatDakk]

Just wanted to drop a small message to you. Thanks to your videos, your approach and information, and general attitude, i've been able to do things i've never thought i'd be able to do. I don't come from a mechanically minded family, nor any of the major trades, however, i've just welded together my own workshop shelves, serviced the family car, and i've got about 100 other projects all lined up, thanks to the confidence your videos have given me. You can do these things, anyone can, just find some information, take your time and keep trying at it. :) Your fantastic channel taught me that.

[@jesse1136]

These were indispensable in the oil field. It's unbelievable how much these can move and how quickly. Pumping out cellars, pits, cutting boxes, flooded pads, you name it. Tough enough for roughnecks, but also simple enough a roughneck can rebuild one. Well, some roughnecks.

[@aGmanproduction]

I worked in maintenance at a food chemical company for about 1.5 years, and rebuilt a couple of these. We used ones maybe 50% larger than this to pump I believe cocoa slurry and alcohol. Something about you going through this made it seem so much easier to take apart than the few DAYS it took us to rework them. Maybe ours were stickier, idk. But man does it blow when you test and it turns out you had something put on backwards...

[@kardeef33317]

That little clip of that all sparkly item in the crate is like one of dem cliff hangers at the end of a serial shows.. Can't wait to see whats in it..lol

[@johnt1815]

I work at a steel mill, and we use these all over the place for emptying used oil/grease tanks and for draining sump pits in the basements. I care not to think about the horrors those pumps have seen....

[@mephInc]

Lol I just wrote the same thing. Same pumps, just bigger. Those things will move anything and they take all of 20 min to rebuild

[@SeanBZA]

Think of the poor pumps in a sewage farm, they can't use these there too much, but have to have the good old Grindex, that will take the ball bearing in, and spit it out in tiny little pieces. Then consider they tile the roof there, along with the walls and floors, because every so often something will have a really shyte day, all over the place.

[@chaytonruijsenaars3971]

they are the work horses that dare to do the things we wont, thank God for diaphragm pumps

[@AlFooteIII]

@7:04 "There's nothing worse than working in someone else's filth". @14:39 - You guys don't mind if I turn this place into a pool, do you?

[@sjmww1235]

just what I was thinking

[@SoManyDogs]

Sweet! I've rebuilt hundreds of those Air Diaphragm pumps. We build AODD based Roof Cleaning pump systems. That is a 1" pump and to get max output, you need to run around 50 CFM of air at which point that pump should deliver around 50 Gal/minute open flow. Also, 120 PSI is pretty much max input and you won't quite get 120 PSI of output...closer to 100 before you add resistance and lift losses.

[@mauricevandoeselaar]

I can take apart these things blindfolded in the mean time. I like that you are showing stuff this stuff. I can show my kids what daddy does for a living :-)

[@ratherbeboating10]

I was actually checking one of these out for a design project for class. (Pump type, not this exact company or model) I ultimately didn't pick it because the specified fluid had a viscosity which was a couple orders of magnitude beyond what these were reccomended for. I priced out a progressive cavity pump instead figuring that will probably work with the high head and relatively low flow high viscosity "Fluid". Great video as always.

[@deankruse8751]

When you said it's used for pumping oil it reminded me that our oil pump at work (quick oil change place) we use tons of them to pump oil around the place

[@blickberg8404]

These things are amazing. I had to clean up some experment gone haywire in a previous job and needed to put the liquid marshmallow waste into 55gal drums. Worked like a champ. Only main downside was the ice that formed around the air fittings after a long time of pumping.

[@brentonrawhoof1967]

Hey AVE! Thanks again for a great video! I am currently taking a hydraulics and pneumatics class at my local community college and I have been sharing your videos. They have proven to be quite informative and mention a ton of the stuff we have been learning about in class!

[@Zheeraffa1]

"You take it a-part, something falls out and then it works again." True for diaphragm pumps and modern electronics alike.

[@afourtrackmind]

I knew someone once who had extremely good suction characteristics. Good friend to have.

[@logankincade661]

Gotta love country gurls !!!

[@jerrybungard7107]

Those are very durable , versatile pumps with many different diaphragms available for everything from acid to car soap. Easy to rebuild as well. The ones we used were not rated for more than 80 psi and we usually ran them at approximately 40 psi. Air pressure determines outlet pressure

[@Mybored001]

Gawd I cant count the number of these I have rebuilt. I have decided that since I spend more time watching you than TV anymore I will pay for it. Patreon mode engaged.

[@rcmadness13]

ken dixon Nice. That’s cool of you

[@rcmadness13]

Not to mention the comments are always good. No preteens squabbling about who’s torque wrench is bigger.

[@noone-nd4ml]

@@rcmadness13 but for the record mine is

[@rcmadness13]

:D ok.

[@Talisman-tb6vw]

I used to repair diaphram pumps used in the making of semi-conductors. Our's were made of Teflon and we were pumping acids and solvents. A repair kit was O-rings, diaphrams, and some gasket material appropriate for the type of liquid we were pumping. the O rings were usually teflon, as were the diaphrams - and all the connecting parts internal like you had in metal parts - ours were all teflon. Otherwise the acids would eat them alive. :)

[@chadjensenster]

A super easy way to smooth out your output and put less cyclical stress on you output piping is to attach a short section of pipe that is pointed up and capped off. That way it gets an air bubble trapped in the upright piece. Then when you get a pump pulse, the air compresses and when there is a momentary lessening of pressure the air expands helping smooth out the pulses. We deal with the pumps on a daily basis and we were having issues with the down stream piping because the pulsing. I suggested some kind of diaphragm to help smooth out the pulses and the plumber said I didn't even need to do that. He told me about using a piece of pipe with trapped air. It works like a charm.

[@juliogonzo2718]

Kinda like the thing that takes away water hammering. Cool

[@erikanderson3633]

You know why AvE is so successful and only going to get bigger... he’s the shop teacher we always wish we had or maybe some were fortunate to have and miss (subconsciously) and the comment section is the classmates that kept us hanging around the shop even after the school bell rang

[@Sandawgk5s]

Ah, the old "Whizz-Bang" I would spend entire watches hearing those things play the song of my people!!

[@morg52]

At my work as a readymix driver, we use these pumps as part of our wash out systems. They don't have to pump gravel but they can handle stuff that is pretty nearly concrete that hasn't set yet. The outlet is a hose that runs up and into the rear of the drum, maybe six feet long. They don't really need much air, just enough to keep the pump cycling. If you run it at full pressure, you'll run the truck out of air. New guys will plug them up all the time. Takes experience and the ability to learn from your screwups to keep them working properly. I love the system. I can use it to pump out footings prior to placing concrete and catchments when I need to get lots of water into the drum and there's none to be had coming out of a tap.

[@timkerr2094]

Just catchin' up on the vids. Friggin' love your plan for the CNC mill, PLEASE can it be called the SKOOKUM SKUNK WORKS! though.

[@rippspeck]

We used diaphragm pumps for all things liquid at the old paint factory, even highly abbrassive and flamable stuff. Great machines.

[@STONEDay]

Is this industrial diaphragm strong enough to keep Skynet from reproducing?

[@chirodiesel]

And here I am, watching this again after two years or so. I know so much more than the first time I watched it because of watching all of the rest. I rather like your code. Something in me now tells me that you made this video for grins and to have an excuse to clean your floor. Thanks for all the good code.

[@LongPeter]

Was anyone else transfixed on the tiny goat?

[@jasonwcoleman250]

Not till I read this comment.

[@spikeydapikey1483]

Safety Goat.

[@raymondmucklow3793]

Looks like a pot grinder, in dischighs.

[@yacinebenahmed_uqar]

Obscure reference maybe?

[@troymeredith521]

Tool Goat (gloat) for his new CNC?

[@chechecole5905]

When you said constantly wear out you really hit it home. I remember having tonreplace diaphrams every month or so.

[@Akira42]

Used to use these in the distillery to pump out the bunds because they could cope with all the extra crap that came with the liquid. Was never bummed out when they blocked either because it was a nice easy half hour taking it apart and putting it back together again.

[@mephInc]

Or a tappy tappy with a hammer.

[@AflacMan13]

Or do what he did here, and have a solenoid reverse the flow for a moment to blow the chunks out, and then go back to forwards and pump away.

[@jpkalishek4586]

Zip ties, and the tamper rings from 5 gallon pails will do a number on stopping the balls

[@jpkalishek4586]

Oh, and the diaphragms really hate razor blades being pumped through

[@Akira42]

@@mephInc Much too quick.

[@billneu9520]

Great information from a expert engineer, inventor, developer, creator; master mind. Thanks Bill N never miss your videos

[@menardyoung9895]

Must have been a lady nearby so many jokes missed.

[@mrhhj]

I indefinitely borrowed one of these pumps from my last job years ago without a purpose but have found many over the years since. Great to see the works explained. Thanks.

[@eatinginternet8690]

"You don't want to ruin a $1000 pump" *tightens the bolts in a circular pattern*

[@BeerMe831]

When I was in the Navy these pumps were a life saver for pumping out bilges. They were definitley skookum and pumped through all the shit we dropped through the deck plates.

[@thedevilinthecircuit1414]

AvE ensures that we're taught About diaphragm pumps and the lot: How they chooch, how they chach, And like most films we watch He ends with the big money shot!

[@THEfamouspolka]

HahahahahHHHahHHHHHahHahahahahahahahahahaabuahahahahahahahahhahahahHHHagGHHHgagHAaaaaaaa Oh, 😅

[@Raeilgunne]

I've rebuilt probably a dozen or so of these in the couple years since I got promoted from partpusher to greasemonkey. Love em, fastest maintenance task we've got with no downtime, cause all our pumps are in tandem with one sitting idle. One pump starts leaking, throw over two hand valves and the other takes off, sealing the first off from flow to get removed, repaired, and reinstalled as soon as I finish my coffee. Rebuild is simple but keeps your hands moving, and you can't screw it up blindfolded.

[@aaronr3637]

They work great for pumping dirty bilge water. Easily defeated by zip ties and electrical tape, however.

[@Iexpedite1]

I used many a double D pump over the years to pump jet fuel and water with jet residue. I only ever had to tear one of them apart. If you don’t pump much trash they rarely need maintenance. Thanks for the video...something relaxing about that sound.

[@joshuahandy9454]

“Don’t use blue because the sticks will poke through.” I’ve learned so many funny sayings from Uncle Bumblefuck.

[@multishit6664]

Get two birds stoned with one bush eh?

[@anno0001]

I love how the comments section on any AvE video is so mature. Makes me happy.

[@CD-sk1ur]

Thank you Mr. Uncle Bumblefuk. Your vidz are my favorite. If I don't have a vice🗜, could I still use a diaphragm pump⚗,?

[@jamesg6071]

I rep Gracos and these guys can go everywhere. Really a great pump when it’s put in the right application.

[@frankinjeep1194]

I have torn more of those apart in the oil and gas industry than I can count . They will take more abuse than me every 28 days from my wife!

[@memegusta42]

we have used the same model pump to suck waste oil, kerosene, and clean CNC machine sumps for more than a decade (the same pump mind you). last month it quit working because the ball cages had completely eroded, and the check balls were clogging the outlet line. I fixed it with a pair of roll pins to act as a ball cage, and the friggen thing came back to life! amazing bit of kit, here's to the next ten years!

[@ToTheTopCrane]

Diaphragm pumps are tougher than woodpecker lips!

[@kiloandgreg]

Ave i have been watching you for a couple of years heare from alberta , your vids are amazing and you have tought me so much and have entertainment value to say the least , your the best , keep up the great work for all of of us that love to come home at night and see what your up to next , the very best channel on youtube hands down !

[@johnmorgan1629]

Always believed dry pumping did nothing to advance mankind, especially when the balls are worn out!

[@petershirkey8353]

well, came accross this shit somr six months ago some what comforting.. I can sit and watch this for hours at as time .. your vernacular and twisted englais is more comforting than the subject materiel you pick .... allways a treat learn something new every time and bejesus Ive been doing the same shit for 55 years.. good work here .. keep it up many tx peter

[@rbmk__1000]

"inflammable means flammable what a country" Dr. Nick Riviera

[@texasdeeslinglead2401]

As a dislexic I can't bear words like this . It makes me want to grab a good length of 1" sch. 80 pvc and walk over to the ass hats office that thought it was a good idea.

[@claytonatkins6058]

texasdee slinglead 1” GRC is bound to end them rightly

[@samiamm5764]

texasdee slinglead There’s other ones besides schedule 40? Hmm I didn’t know that, something to google into later

[@dumbbuck]

I used to use a single chamber diaphragm pump that ran off 240v power (Aussieland angry pixies) to pump tennis court paint. Very thick with a fine grit sand in it. It was the easiest way to move that paint from one 44 gallon barrel to another for fast refills while painting a court. Its a brilliant pump and so simple that even my Dad can service it.

[@stephenraney5607]

Cruel and unusual unboxing withholding!

[@dr.feelgood2358]

i'm pretty sure it isn't new. hence the lack of boxing

[@samiamm5764]

Made up for it with mystery un-crate at the end

[@TonyFleetwood]

thats how i was conceived according to my mother... blown out diaphragm...

[@michael-michaelmotorcycle]

When our pumps fail to chooch we give it a good healthy squirt of Kroil in the dingus end. That’ll get’r chooching long enough until shift change. That’s a trick you don’t learn until you make it to dayshift. Repaired many of these pumps when I was the FNG on graveyards. Also recently the elecchickens have plumbed in a mac-valve to control the uppers & downers in the process.

[@MrEricOBrien]

These videos are taking after Marvel movies with the little stinger on the end.

[@brandonobaza8610]

Used these to transfer laundry chemicals from barrels to main feed tanks. Lots of caustic bases and the acids used to neutralize them. No lack of compressed air with our 50hp Sullair. I worked there 6 years and never had to service or replace the diaphragm pumps.

[@guillaumeperron6651]

We rename that ''une pompe à poumons'' in underground mine here in Québec

[@ryanlukens9280]

Watching this brings back memories. I worked at a plant that used these to move hydrochloric acid and sodium hydroxide (not in the same line, mind you) for a process in water purification. I spent to many hours rebuilding these pumps over the four years I was there.

[@djambrosia]

Such a tease!

[@rosen9425]

nice. I use these things daily, hose emptying after tanker truck loading, and it's the oddest thing I've come across. Truly handles every chemical and has impressive flow rate going vertical into the main tank farm pipes.

[@peregrine1970]

So it's able to suck start a Harley through 50 feet of garden hose?

[@Mudsuitable]

I have three in the shop for engine oils, one for anti frizzle and one for waste oil and the ones for 10w30 and 20w50 sound like that Nine Inch Nails song, it's one of those things where once you hear it and associate it, it can't be unheard and will never go away. for the past 18 years Closer plays multiple times everyday in my shop

[@Toms3rdNut]

I used to work in dairy water treatment.. oh Jesus I can hear it now. Dush, dush, dush, dush x838,765,975. And the ball valves are fun to throw at crows

[@tstevens6554]

ARO is the absolute best brand of diaphragm pumps for ease of use and/or ease of repair/rebuild. Crazy awesome Unit you have there!

[@garysauer447]

New healing mat.

[@conradinkranz4968]

The like dislike ratio really speaks for the quality of your content, could watch your videos for hours.

[@Tedd755]

0:00 I think your dolly has square wheels

[@miniwarrior7]

😂 Indeed it does shakin like a scared dog

[@martinxXsuto]

of course it has. it's canadian

[@martinxXsuto]

(Canadian cars having square wheels is a South Park gag)

[@curtisjackson3001]

Love these pumps I have 4 in my shop 3 in use 1 on the shelf new. Saves hours of work everyday

[@ahensley63]

Enough with the teases! Did you say you are sharing the shop? Or just sharing the building with other shops next door/other bays?

[@ahensley63]

Also, Mrs Bumblefuck probably appreciates how quiet its been around around the Empire of Dirt 1.0

[@kellyfull611]

I work for a company that builds custom service trucks and we use these pumps for def, antifreeze and evac. The evac sludge that gets run through them is barely liquid. Awesome little pumps that can do it all. Only issue we have is blowing out the seals on the outlet, when using hydraulic hoses if they are rolled back into the reel full of junk they compress and go over the pressure rating of the pump and blow out the pumps internal seals

[@barharborbasher249]

What’s in the crate uncle bumblefüK

[@TheInfectedWreck]

Best transfer pump ever created, used these for so many application in shitty situation in mine mills.

[@golfman9290]

Christmas turkey!

[@analog56x]

i love these pumps! ive used them in quite a few jobs that i have had. we use them at the tire shop to pump beet juice and calcium for agricultural tires

[@microwavetechnician7493]

13:40 star pattern you fack!

[@ChrisXJones518]

Nice to see a boltr on one of these. I work at a chemical plant. We use wilden pumps for the most part. Anything from water to Acetone or Toluene.

[@opensourceinvesting7104]

why use air and not a mechanical chucher for pushing the diafram back and forth and what not?

[@orcoastgreenman]

Advancing Education - probably because this one is intended for use in flammable locations. They make these with electric motors too I’m betting, but not rated for explosive fuel environments.

[@petermichaelgreen]

I would think one advantage of an air drive is it can sit there all day with the outlet of the pump restricted/blocked/shut off whereas a stalled electric motor tends to overheat.

[@orcoastgreenman]

PETER GREEN - good thinking, I hadn’t even thought of that. The electric ones used for potable water in RV’s have a built in pressure switch to turn them on when the water is turned on at faucet or valve, and off again when demand stops and pressure rises again.

[@deanalexander9367]

I've overhauled so many of these Aro pumps since I was an apprentice, ours pump dirty solvent glue solutions. It's still one of the jobs I actually like to do!

[@mikeoliver3254]

Shiny, what could it be.

[@omfghai2u]

Now that he has a cnc machine and a pump for moving flammable liquids, the only possibly conclusion is AvE kannukistan launch service.🚀🛰️

[@JBFromOZ]

mars rover

[@BennyFlyby]

A place I used to work used these everywhere. I always wondered how they worked, and now I know that my speculations were completely incorrect, lol. THANKS!

[@snap-off5383]

5:31 Don't smoke stems! Hate buying prerolls because someone else thinks lumber is consumable. But for that matter I bust them out of the paper and still send them through the bong, because again, lumber is not consumable.

[@JWH3]

We used those diaphragm pumps to pump sludge slurries between a few metal finishing waste treatment tanks. They really are tough.

[@elliotsamuel]

i like ur goat

[@xactedsyence]

I worked on a well flow back treatment site and we used 3" versions of these for everything. Need a pressure washer to clean treatment tanks and lamella clarifiers? Hook 50' of 3" tigerflex and neck it down to 1/2"-3/4"... gotta suck up rainwater on containment that had nails, rocks, mud, and every other conceivable obstruction under 1.5 inches? Take the "power washer" tip off and flip the inlet and outlet... A diaphragm pump can move absolutely anything, only issue we had was with the high cfm compressors running them wide open for several hours pressurizing a solids separation press we would have to drip RV antifreeze in the air line pre pump so the pistons and mufflers wouldn't freeze up.

[@ramosel]

needs more "chickadee"...

[@stanpatterson5033]

An appearance by Chickadee is always guaranteed to put a smile on a sane person's ugly mug :) And some of us crazy bastards like it, too !