Open sewer vent pipe in cabin..Really?!!! - Page 7 - Escape Trailer Owners Community

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Old 02-19-2018, 11:53 AM   #61
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Originally Posted by PGDriver View Post
An air admittance valve should only allow air into the system not sewer gas out.
They are used quite often in areas where vents arenít feasible such as kitchen islands etc.

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Doug
They also use a loop vent in kitchen islands . While neither the hepvo or loop is the preferred venting method , I much prefer the loop vent .
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Old 02-19-2018, 12:01 PM   #62
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Correct me if I'm wrong but I think the issue was that over time, the valve could leak and at least on my 21', there is no way to get to it without cutting the wall open. It's hidden in the wall.


Tom you got me there, but then again it is possible given time anything with a moving part could fail. I think Iíll just enjoy my camping trips and not worry about every worst case scenario that could happen, lifeís to short.



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Doug
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Old 02-19-2018, 12:06 PM   #63
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Originally Posted by tdf-texas View Post
Correct me if I'm wrong but I think the issue was that over time, the valve could leak and at least on my 21', there is no way to get to it without cutting the wall open. It's hidden in the wall.
That is certainly my issue with an air valve hidden in a wall. Until convinced otherwise, I expect that eventually an air valve put in there will leak, and if the valve is inaccessible, it will be difficult to repair. If the air source for the valve is exterior to the trailer, slight long term leakage in the wrong direction will not cause odor in the trailer.

I could be wrong, but I think that the odor issue is a bit more of a challenge than in a house given the far smaller volume of interior air in a trailer.
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Old 02-19-2018, 12:23 PM   #64
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Originally Posted by PGDriver View Post
Tom you got me there, but then again it is possible given time anything with a moving part could fail. I think Iíll just enjoy my camping trips and not worry about every worst case scenario that could happen, lifeís to short.



Cheers
Doug
Sorry Doug, I guess it's the engineer in me - I always look for points of failure and try to design them out. If it's going to fail regardless of the design, then I make sure it is accessible.
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Old 02-19-2018, 01:23 PM   #65
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Airstreams have been using these air valve types in their units for years and my Lance Trailers had them. It is common in the rv industry, not in the residential home business.
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Old 02-19-2018, 01:48 PM   #66
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Sorry Doug, I guess it's the engineer in me - I always look for points of failure and try to design them out. If it's going to fail regardless of the design, then I make sure it is accessible.
No engineer here, but same attitude. There is usually enough unanticipated mischief to deal with without deliberately building in future problems, especially ones that would require major surgery to correct.
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Old 02-19-2018, 02:14 PM   #67
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Originally Posted by cpaharley2008 View Post
Airstreams have been using these air valve types in their units for years and my Lance Trailers had them. It is common in the rv industry, not in the residential home business.
They're even common in certain residential situations, typically when a sink is installed in a kitchen island, leaving no way to get a vent pipe to the ceiling. Of course, they use an air admittance valve - they don't just leave the end of the vent pipe open.
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