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Your cart is empty.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 is the innovative hygienic Self Sealing Waste Valve. It replaces the traditional water-seal trap and prevents the escape of foul sewer air from waste discharge systems. Unlike conventional waste traps, HepvO does not rely on trapped water to create a seal. Water seals are prone to failure by Evaporation, Siphonage and other Mechanisms. Instead, HepVo uses a self sealing membrane which performs the same function as a water seal trap but without the risk of depletion or freezing. HepvO actively eliminates negative pressure within the waste system by opening and allowing in fresh air until a state of equilibrium with atmosphere is reached. This means that secondary venting of the waste system via the inclusion of air admittance valves in the waste system is no longer necessary.
Jerry
Reviewed in the United States on April 20, 2025
This item solved a space problem I had under a bathroom vanity where a standard trap would not work as it can be installed vertically. It has been in use for 2 seasons with no problems.
Trout chaser
Reviewed in the United States on May 31, 2024
recommend using this for a cargo trailer conversion project.
Robert F.
Reviewed in the United States on October 10, 2024
Fit perfect to replace the original part
Butch
Reviewed in the United States on September 14, 2023
Works great. Watch what goes down your drain. Hair and oil can clog this trap.
Erick anderson
Reviewed in the United States on September 10, 2023
Put this in the camper last week. As with all jobs it was three runs to the hardware store. The distance from the pipe to the sink was too short so I had to improvise, was not a direct fit. This will vary camper to camper but be ready to make it fit…
Todd C
Reviewed in the United States on March 24, 2019
The sink in the outdoor kitchen in our Sand Piper RV started to stink. After looking a bit while on a trip, I found that the installed waterless waste valve had a tear in the rubber sleeve inside the valve that was allowing sewer gases to come back into the sink. No one local had one of these while we were on our trip, including an RV store. This was a perfect fit and fixed the problem.
Robert
Reviewed in the United States on March 25, 2017
We replaced all the traps in our RV and have used these in 8 degree weather with no issues. I'm not sure what all the grousing is about but it may be that they are experiencing a mineral build up. We have found that we need to service our traps about every 9 to 12 months of full-time use. If used regularly (monthly) a mixture of baking soda and vinegar poured down the sink seems to do the trick.Used as a pee trap for our Nature's Head toiled, I've found that you need to follow each visit with a spray of vinegar to keep the minerals under control. If you find that minerals still build up, remove the trap and immerse it in a bowl of vinegar over night and then pull a brush gently through the trap until the mineral deposit has been removed. Bottom line, there is never going to be a maintenance-free option for traps.We never experienced a problem with freezing but as another reviewer mentioned, heat tape applied to the trap ought to do the trick.Cheers, B
Zebra man
Reviewed in the United States on October 28, 2017
I have been using these in an RV for five or six years. They perform flawlessly. Clears up space under a sink or other tight places. For we snowbirds, it is great for replacing the traps back up in the north. No more coming home to dried up p-traps and the resulting aroma.My only question is "why does not every RV come with these things?" Space is so precious in an RV.
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