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  1. RV Waste Valves
  2. LaSalle Bristol
  3. Single Waste Valve - Manual
  4. 3 Inch Valve Body
  5. Straight Valve
  6. Stationary Valve
LaSalle Bristol Waste Valve Body for RV Black Water with Seals and Hardware - 3" Diameter

LaSalle Bristol Waste Valve Body for RV Black Water with Seals and Hardware - 3" Diameter

Item # 34439240
Our Price: $20.90
You Save: 44%
RV Waste Valves
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Shipping Weight: 0.77 lbs
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Great Prices for the best rv waste valves from LaSalle Bristol. LaSalle Bristol Waste Valve Body for RV Black Water with Seals and Hardware - 3" Diameter part number 34439240 can be ordered online at or call 1-800-940-8924 for expert service.
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LaSalle Bristol RV Waste Valves - 34439240

  • Single Waste Valve - Manual
  • 3 Inch Valve Body
  • Straight Valve
  • LaSalle Bristol
  • Stationary Valve


  • Replacement valve for your RV's black-water tank
  • 3" Diameter passage allows wastewater to travel freely when valve is open
  • ABS plastic valve with stainless steel shaft
  • Valve body, seals, and hardware included
  • Made in the USA

39240 LaSalle Bristol Waste Valve Body for RV Black Water w/ Coupler, Seals, and Hardware - Termination Valve - 3" Diameter

Video of LaSalle Bristol Waste Valve Body for RV Black Water with Seals and Hardware - 3" Diameter

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for LaSalle Bristol RV Black Water Waste Valve Body Installation - 2017 Jayco Seneca Motorhome

Hey guys, it's Jake here with etrailer. Today we're gonna be taking a look at, go over a few details and we're gonna show you how to replace the LaSalle Bristol RV waste valve. Now, there's a couple of different reasons of why you would need to replace your RV waste valve. The most common being that it's leaking or it's not working properly. One of the biggest reasons of why it leaks is because the pipe or the valve itself has a crack in it. These valves are very, very finicky.

If you pull too hard on 'em, you can break the handles off. The inside flap that actually closes off the pipe is just plastic. So if you pull too hard during the winter you may risk breaking it 'cause it's more brittle. Another reason is that the way that the valve is positioned if you close it premature, say you pull the wrong valve and you try to close it premature, the valve actually being or the tank actually being emptied what can happen is there's a slot that that valve shuts off into. What you can do is you can take some tissue paper and end up shoving it up into that slot.

This is gonna cause that valve to never properly close again. 'Cause what'll happen is that tissue paper will turn rock solid and you'll never be able to close the valve all the way. So if you're having trouble getting your valve closed all the way up, that's probably your issue. So let's go ahead and jump into the insulation. Most of your valves are gonna have four bolts and nut combos on the four corners and it's most likely going to be a 11 millimeter bolt and nut.

So we'll just remove these. It is a good idea to drain your tanks if you have the ability drain your tanks and leave them open the night before. That way your pipes have a little bit of time to dry out so that when you pull this valve out you don't have anything leaking on you. Now depending on your setup, this may differ for you. For us, this pipe goes straight back.

So we will have a little bit of wiggle room here. We just replaced this valve and there's not much room to move at all. So I actually had a friend of mine hold this pipe back while I slid the new valve up into place. We pull the valve out. This is what we're talking about. This is just the gray water. So no worries. That is the groove I was referring to that you can get stuff suck in. We're replacing these because they're just too hard to pull. But this is what I was talking about that you could smash stuff up in there and you'll never get it out. So pull this out. Make sure you take your seals out. If they're been on there for a while, they're probably stuck. They'll look like this and you'll have two of them and we'll pop the other one out. We can grab our new valve. Hey, notice our new valve is gonna be nice and smooth. There's nothing in the way. Our gaskets are gonna be pre pressed in here. Just make sure they stay in there when you're putting it up in place. But we can close it and we we'll pull back on our pipe here wide enough to go around our gaskets, slide it over, make sure both of the fittings are getting lined up there. Nothing. You just wanna make sure that your gaskets aren't folding over themselves and you should. A pretty good judge of that is that this if you have this style of bracket it won't go up flush to it. It may be cocked like that a little bit but you can see here it's nice and flush. So we'll take your new hardware and put it in place. Now you wanna make sure you're putting even pressure on these. So give each one a few turns and then go back around and snug everything up and we'll go ahead and test it out. It works just as it should, If it seems a little tight at first, that is just because the rubber is new on the inside. That's actually a good thing that it means you have a good tight seal as you get, you know, more use out of it and some more liquid comes on through here it will get a little looser. Well guys, hopefully this video helped you to install your new RV waste valve.

Customer Reviews

LaSalle Bristol Waste Valve Body for RV Black Water with Seals and Hardware - 3" Diameter - 34439240

Average Customer Rating:  4.8 out of 5 stars   (56 Customer Reviews)


Item was exactly what I expected, perfect replacement for my broken valve body. No need to replace the rest of the plumbing.



Still working as when newly installed, no issues at all.


Received the waste value in excellent condition and have installed and tested it. The value worked as designed and was the exact replacement part that I needed.

Thanks for your help.


Have had excellent experience with e-trailer good job


After searching the web for an RV part I found E-Trailer! Kelly was so helpful, making sure I ordered the correct part, I did. Showed up just in time!
Appreciate the help and if needed will definitely use your store again.
Thank you!


I spent most of my life in customer service running an auto parts store. I would have hired Helen without meeting her in person. If that tells you anything.


Etrailer is top notch always. USPS not so much!


The valve was an exact replacement. It arrived in a short time.


It’s working properly and seems to be made of quality materials.


thank you as allways


Exact replacement, easy installation. Lubricated seals with o-ring grease, worked perfectly.


Great product.


Exact replacement for our old leaking valve. Fit perfectly and work well. We have not yet checked them for leaks since it is still winter. No reason to expect an issue though.



Great replacement valve. No issues


Have not had the time to install, so can't say anything about it. Order was delayed slightly due to stock, but I was kept informed the whole time.


Very quick delivery and pricing. Very informative about part that is back ordered and some alternatives options if I choose.


My RV black water tank drain began leaking so I searched for a replacement. I've purchased other products from etrailer before and have been satisfied. This product was delivered promptly, and it fit as advertised. Always check the return policy of vendors before ordering!

Ronald S.


One year later and the tank is worki


Got the Bristol valve body, due to manufacturing delays, took several months. It arrived well packed, no damage. I know have an extra for standby in my backup kit for the road.


Fantastic them girls did me good.I’ll b back


Fit my 1990 HiLo camper trailer perfectly. Had to take it back off on first try and lubricate the seals on the sides that touch the valve. Without the lubricant the seal grabs the slider inside the valve so tightly that it was too hard to open and close. No instructions on package but I should have known. Not that much problem putting on or taking off. Another great buy. Have been ordering from this company for all my parts while I have been reworking this trailer I just recently purchased. is now the only supply company stored in my favorites on my desktop.


It worked, not much else to say about it. Oh, I should mention it’s easier to install when you put the seals on the inside of the mating parts, then you can slide the valve into place and not worry about rolling or crimping the seals.


They are still working great after one year of normal use. They were replacements for the original gate valves that were standard on my new RV. Those original valves only worked properly for about 9 months.


Great Service and response


You guys are the BEST!!!!!! I can find what I need
and you ship it out FAST!!!!!!


Quick delivery and correct product.


It's great that you can buy just the part that needs to be replaced rather than the entire valve.


Ordered many products from etrailer and always get quality parts at good price and this purchase is no exception.

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Dustin K
Video by:
Dustin K
Employee John S
Video by:
John S
Employee Thomas T
Video by:
Thomas T
Employee Cole B
Installed by:
Cole B
Employee David F
Installed by:
David F
Employee Amanda M
Edited by:
Amanda M
Employee Halie H
Written by:
Halie H
Employee Jacob H
Test Fit:
Jacob H
Employee Adam E
Test Fit:
Adam E
Employee Matthew E
Updated by:
Matthew E
Employee Cody B
Updated by:
Cody B

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