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Wavin BV1B/UB HepvO Sanitary Waste Valve - 1-1/2"

4.6 4.6 out of 5 stars 968 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Pest Control Traps by Wavin
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  • Model number: BV1BUB112
  • Country of Origin: China
  • Brand name: HEPVO
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Customer ratings by feature

Easy to install
4.2 4.2
Value for money
4.0 4.0
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Wavin BV1B/UB HepvO Sanitary Waste Valve - 1-1/2"

Wavin BV1B/UB HepvO Sanitary Waste Valve - 1-1/2"

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Product Description

HepvO is a self-sealing valve designed to close the waste connection below a sanitary fixture to prevent the escape of foul sewer air into the dwelling. HepvO unlike conventional waste traps, does not rely on trapped water to create a seal. Instead, HepvO uses a self-sealing membrane, which performs the same function as a water seal trap but without the risk of evaporation, siphonage, or cracking under freezing conditions. The HepvO valve means enhanced plumbing design and system efficiency, without compromising performance or risking the escape of foul air into the living space from the drain or sewer. Typical Applications: Lavatories, bath tubs, sinks, bidets, washing machines, garbage disposals, overflows, dishwashers or showers.

Customer reviews

4.6 out of 5 stars
4.6 out of 5
968 global ratings

Customers say

Customers like the ease of installation, performance, quality and stink of the valve. They mention that it works well, it's of good quality and that it helps keep the stink out. They are also happy with size. That said, some complain about leakage and disagree on fit.

AI-generated from the text of customer reviews

32 customers mention29 positive3 negative

Customers find the installation of the valve to be easy. They say it works well with a simple installation, and is an exact fit. They also appreciate the compact design and the fact that it works perfectly for their van grey tank to keep smells down.

"...Didn't have any install issues, pretty self explanatory. I installed mine vertical to lessen any cleaning or potential clogs...." Read more

"This is easy to install and works great" Read more

"...Works like a charm and as it is meant to work. No more odors from my bathroom sink." Read more

"...Works great so far. No more sewer gas." Read more

25 customers mention25 positive0 negative

Customers are satisfied with the performance of the valve. For example, they mention it works well, is easy to install, and prevents odors from escaping. Some say it's a little ugly, but does the job.

"...Anyway, mine works flawlessly and I saved a ton of space under my sink." Read more

"...These are a must have for odor. They work great and last quite awhile." Read more

"...Works great a little ugly but does the job. Amazing how little water it takes to flow down the membrane. Makes a very good condensate p trap solution." Read more

"This is easy to install and works great" Read more

24 customers mention18 positive6 negative

Customers like the quality of the valve. They mention it's well made, and expects it to last a long time. Some say it'll be worth every penny. Customers also mention it works well and is perfect for an RV where space is important. They say it is a direct replacement for existing equipment and is able to keep sewer odors out.

"...These are a must have for odor. They work great and last quite awhile." Read more

"This P-trap is perfect for an RV bathroom vanity. After watching YouTube videos, it can placed vertically and still stop angels from entering the RV." Read more

"...all automated and just out of whack but the bottom line is a defective part because you can't screw anything to it...." Read more

"...These are very well made and I expect them to last a long time." Read more

23 customers mention20 positive3 negative

Customers like the valve for keeping the stink out of their home. They mention that it works well, has no leaks, and has kept gray tank fumes from entering their tiny home.

"Just what we needed for our RV kitchen sink..no more smell!" Read more

"...One on a sink and one for my shower. Both have kept the gray tank fumes from entering the tiny home." Read more

"...Voila! A clean smelling sink." Read more

"...No ptrap to dry out, no pump to fail, no sewer gasses.This product is simply amazing." Read more

12 customers mention12 positive0 negative

Customers like the size of the valve. They say it is a unique solution to special space requirements, and that it requires less space. Some customers also mention that the design is simple and compact, making it easy to install and remove.

"...Anyway, mine works flawlessly and I saved a ton of space under my sink." Read more

"...There is so much extra room for storage under the sink! And it is freeze proof and stink proof. Thanks for a better way drain the sink!" Read more

"A Unique solution to special space requirements. I used it with salt water drain from water softener into septic system...." Read more

"...Same brand and size. Just double check the size. 1 1/2 inch was the size I needed" Read more

14 customers mention8 positive6 negative

Customers are mixed about the fit of the valve. Some mention it's a perfect fit for small spaces, and easy to install. However, others say that it didn't fit any of their six sinks, and that the threads were much smaller than needed.

"...An easy job and an exact fit." Read more

"Didn't fit any of our 6 sinks." Read more

"Perfect fit to replace the ones on my rv shower and washing machine pipes. Same brand and size. Just double check the size...." Read more

"...Nothing fits the threads. 1 1/2” ABS doesn’t fit, 1 1/2” schedule 40 doesn’t fit. The only instructions on their site says how easy it is to install...." Read more

11 customers mention3 positive8 negative

Customers are dissatisfied with the leakage of the valve. They mention that it leaks like crazy, the seals had dried up at the couplings, and the self-sealing membrane is stuck open.

"...them, it did burp once, and the pressure was so high, it leaked out of the fittings...." Read more

"...The old one was partially clogged and the seals had dried up at the couplings...." Read more

"...off set to line everything up. All went together fine with no leaks. Have more room under the sink in my Airstream trailer." Read more

"Third one since 2019This one leaked out of the box...." Read more

Works
4 Stars
Works
Used this in the RV bath sink drain to help with smells and burps. Seems to help with them, it did burp once, and the pressure was so high, it leaked out of the fittings. With that known, I cranked them down extra, I'm gonna regret that later.Want to install one in the kitchen, but not nearly as easy to reach.Didn't have any install issues, pretty self explanatory. I installed mine vertical to lessen any cleaning or potential clogs.Plan to get the kitchen when im motivated.
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Top reviews from the United States

ken gray
5.0 out of 5 stars Works perfectly, saves space
Reviewed in the United States on July 9, 2023
Verified Purchase
I still don't know why these aren't code for residential use in most places...they've been used throughout Europe and the UK for years...I suspect it has something to do with lobbying efforts from plumber unions. Anyway, mine works flawlessly and I saved a ton of space under my sink.
One person found this helpful
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MMMC
5.0 out of 5 stars Perfect for our RV sink
Reviewed in the United States on September 27, 2023
Verified Purchase
Just what we needed for our RV kitchen sink..no more smell!
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Steven J
4.0 out of 5 stars Works
Reviewed in the United States on July 8, 2023
Verified Purchase
Used this in the RV bath sink drain to help with smells and burps. Seems to help with them, it did burp once, and the pressure was so high, it leaked out of the fittings. With that known, I cranked them down extra, I'm gonna regret that later.
Want to install one in the kitchen, but not nearly as easy to reach.
Didn't have any install issues, pretty self explanatory. I installed mine vertical to lessen any cleaning or potential clogs.
Plan to get the kitchen when im motivated.
Customer image
Steven J
4.0 out of 5 stars Works
Reviewed in the United States on July 8, 2023
Used this in the RV bath sink drain to help with smells and burps. Seems to help with them, it did burp once, and the pressure was so high, it leaked out of the fittings. With that known, I cranked them down extra, I'm gonna regret that later.
Want to install one in the kitchen, but not nearly as easy to reach.
Didn't have any install issues, pretty self explanatory. I installed mine vertical to lessen any cleaning or potential clogs.
Plan to get the kitchen when im motivated.
Images in this review
Customer image
Customer image
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Customer
5.0 out of 5 stars Must have for off grid
Reviewed in the United States on October 12, 2023
Verified Purchase
Living off grid I have a grey tank under my kitchen sink and a compost toilet with a urine diverter. These are a must have for odor. They work great and last quite awhile.
One person found this helpful
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Luke Underwood
5.0 out of 5 stars Were Easy to Install With No Stench Whatsoever Rising From the Sewers
Reviewed in the United States on September 24, 2022
Verified Purchase
I was skeptical about these working but nothing ever got caught in the inner silicone and I've never smelled anything coming from my septic system. They've been there for a few years now and also never froze. Make sure to install them so that all water drains out and you don't get clogged up with ice.
One person found this helpful
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soniccool
5.0 out of 5 stars Works as a condensate p trap line that ties into sewage
Reviewed in the United States on November 18, 2022
Verified Purchase
Found out after buying my house that one of my mini split condensate lines was ran into the sewage which caused foul odor in the room. Use this as a condensate drain to prevent sewer odors from coming up since the condensate line goes straight into sewage. It was extremely difficult to find the pipes and connections to make this work since this is mainly for sinks. But the documentation says it can be used for condensate lines and so it is. Works great a little ugly but does the job. Amazing how little water it takes to flow down the membrane. Makes a very good condensate p trap solution.
Customer image
soniccool
5.0 out of 5 stars Works as a condensate p trap line that ties into sewage
Reviewed in the United States on November 18, 2022
Found out after buying my house that one of my mini split condensate lines was ran into the sewage which caused foul odor in the room. Use this as a condensate drain to prevent sewer odors from coming up since the condensate line goes straight into sewage. It was extremely difficult to find the pipes and connections to make this work since this is mainly for sinks. But the documentation says it can be used for condensate lines and so it is. Works great a little ugly but does the job. Amazing how little water it takes to flow down the membrane. Makes a very good condensate p trap solution.
Images in this review
Customer image Customer image Customer image
Customer imageCustomer imageCustomer image
2 people found this helpful
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Capt Rusty Skull
5.0 out of 5 stars Good fit for under RV Sink
Reviewed in the United States on July 8, 2023
Verified Purchase
Purchased this to remove P trap from exiting under the sink plumbing for the RV.

Removed Island to install new flooring so instead of putting it back the way it was I made some extra room under the sink by re-routing plumbing to a waterless P trap.

It’s been in storage since I installed will have to update once I am actually using the sink again.
Customer image
Capt Rusty Skull
5.0 out of 5 stars Good fit for under RV Sink
Reviewed in the United States on July 8, 2023
Purchased this to remove P trap from exiting under the sink plumbing for the RV.

Removed Island to install new flooring so instead of putting it back the way it was I made some extra room under the sink by re-routing plumbing to a waterless P trap.

It’s been in storage since I installed will have to update once I am actually using the sink again.
Images in this review
Customer image Customer image
Customer imageCustomer image
2 people found this helpful
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J Ryan
5.0 out of 5 stars Simple and compact design
Reviewed in the United States on October 27, 2022
Verified Purchase
I converted a 1999 Ford E350 ambulance into an overland camper. There was no room under the sink to install a conventional P trap, and I definitely did not want odors from the wastewater holding tank pushing back up into the interior! This Hepco valve solved the problem perfectly, and has been in service for a year and a half now.
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