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Old 08-02-2014, 09:38 AM   #1
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Nifty device to eliminate Grey Tank Odor

I know I'm not alone with this problem. The Check Valves under the sinks stick open an allow odor off the Grey Tank to come into the coach.
During my typical Saturday morning internet search, I came across a device that looks like it should solve the problem and gain a bunch of space under the sinks at the same time.
Has anyone had experience with the Hepvo device?

Hepvo Waterless Valve
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Old 08-02-2014, 09:43 AM   #2
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Interesting looking device. I will be interested to see comments from others that are using this. Thanks for posting.
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Old 08-02-2014, 10:18 AM   #3
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It sounds like a great idea!
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Old 08-02-2014, 10:34 AM   #4
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Never saw one like that.

Assuming you have room, the Studor works pretty good. It's about $23 compared to the $9 one that is commonly used in our RVs.

Mini-Vent AAV for Branch Ventilation

BTW, Studor also makes a trap with a valve.
http://www.studor.net/combi-siphon
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Old 08-03-2014, 09:17 AM   #5
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MyMontana has that valve for the shower drain. Factory installed. Never a problem.
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Old 09-13-2014, 01:31 AM   #6
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Dennis45: great find for a nagging problem. This is why I read the forums. Thanks, plumbing next week end...lol
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Old 09-14-2014, 10:09 AM   #7
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Quote:
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Dennis45: great find for a nagging problem. This is why I read the forums. Thanks, plumbing next week end...lol
Keep us posted. I have not built up enough reserve to tackle this project yet but am very interested in how it goes.
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Old 09-14-2014, 04:57 PM   #8
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This will not replace your air inlet valve that acts like a roof vent in a stick house. You still need air behind water or it will not flow very well.
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Old 09-14-2014, 06:53 PM   #9
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+1 on Waroland. This is designed to replace the typical P trap only. I don't believe it you could use it for an Air Admitance valve.
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Old 09-14-2014, 11:52 PM   #10
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Quote:
Originally Posted by dennis45 View Post
I know I'm not alone with this problem. The Check Valves under the sinks stick open an allow odor off the Grey Tank to come into the coach.
During my typical Saturday morning internet search, I came across a device that looks like it should solve the problem and gain a bunch of space under the sinks at the same time.
Has anyone had experience with the Hepvo device?

Hepvo Waterless Valve
Actually, they have been around for awhile. Tiffin used 2 of them on my shower and washer drains. They are now using them under some sinks as well. They actually replace the p trap not the AAV, but if they are used, you don't need the AAV.
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Old 09-15-2014, 12:43 AM   #11
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RV Doctor Gary Bunzer.... speaks highly of these and has given them away at his FMCA Seminars. Here is his 10 minute YouTube video: Enjoy.
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