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06-05-2013, 07:12 PM
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#1
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2 Rivet Member
1969 27' Overlander
St. Louis
, Missouri
Join Date: Apr 2013
Posts: 74
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Fancy p-trap!?!
Hepvo Waterless Valve
I'm remodeling a 1969 overlander. I'm wondering if anyone has any experience with these waterless p traps. I'm thinking it may help with my shower drain, by eliminating a standard trap, it may give me more room for pitch toward my grey tank. Also I will not have to worry about freezing traps or dry traps causing odor. Any thoughts or experience?
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06-05-2013, 08:02 PM
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#2
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Rivet Master
1977 Argosy 24
Currently Looking...
Milltown
, Wisconsin
Join Date: Mar 2006
Posts: 1,087
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No experience, but I looked through all the literature and it looks good to me. It could be just what we need to put in grey water tanks in older trailers.
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06-05-2013, 08:05 PM
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#3
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Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
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I'm thinking of putting them in my rig. Not only will it alleviate the dry p trap problem, it looks like it will free up space under the sinks.
__________________
Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
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06-05-2013, 08:17 PM
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#4
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Rivet Master
1969 31' Sovereign
Broken Arrow
, Oklahoma
Join Date: Jan 2003
Posts: 1,455
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Many years ago there was a similar device you could use on a boat that replaced the standard drain plug. The idea was you could leave it installed and not worry about launching your boat without putting in the plug.
I tried it and it worked until some trash got caught in the flap valve and held the valve open.
I finally went back to the regular plug I just didn't trust the rubber valve.
While mine never did fail if it had there was a chance of taking on water so you really could not use it if you left the boat in the water all the time.
Should work in your application but I think the valve would eventually deteriorate and fail. Not much to fail with the standard P trap.
__________________
Garry
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06-05-2013, 08:21 PM
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#5
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Rivet Master
1999 34' Excella
Currently Looking...
Hillsboro
, Texas
Join Date: Feb 2013
Posts: 6,408
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Make sure you properly flush trapnof Cheerios each time...
__________________
Peace and Blessings..
Channing
WBCCI# 30676
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06-06-2013, 07:09 AM
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#6
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Rivet Master
1981 31' Excella II
New Market
, Alabama
Join Date: Sep 2011
Posts: 6,145
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That would be my concern. Once a layer of funk accumulates in this thing it won't work. Anyone who has ever cleaned a p-trap in a bathroom sink knows what I am talking about. Those flapper things are going to get covered in gunk and won't seal. Also if they are plastic they won't last forever. Whatever you use, make sure you can get to it, because it will fail at some point.
Perry
Quote:
Originally Posted by garry
Many years ago there was a similar device you could use on a boat that replaced the standard drain plug. The idea was you could leave it installed and not worry about launching your boat without putting in the plug.
I tried it and it worked until some trash got caught in the flap valve and held the valve open.
I finally went back to the regular plug I just didn't trust the rubber valve.
While mine never did fail if it had there was a chance of taking on water so you really could not use it if you left the boat in the water all the time.
Should work in your application but I think the valve would eventually deteriorate and fail. Not much to fail with the standard P trap.
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06-06-2013, 07:33 AM
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#7
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Rivet Master
2013 25' FB Flying Cloud
2011 23' FB Flying Cloud
Branson
, Missouri
Join Date: Apr 2004
Posts: 734
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The hepvo installation has been heavily discussed and documented on the Casita Trailer forum.
Matter of fact, a fellow in Dallas; Larry Gamble specializes in the install of these, in the Casita units.
When I had a Casita, he did it for me and he's good!
Little House Customs is his company's name.
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06-06-2013, 08:43 AM
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#8
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Rivet Master
2009 27' FB Flying Cloud
1982 31' International
1991 35' Airstream 350
Jay
, Oklahoma
Join Date: Oct 2006
Posts: 1,706
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These traps have also been installed on some new AS models to correct a galley sink drain issue. Even as part of warranty complaints, as recommended by the factory.
It seems in some front bed models, the galley sink drain is plumbed into a "T" in the vent line.
When one pulls the plug on a full sink of dishwater, the surge into the grey tank blocks the vent, and the displaced air from the tank burps up in the shower.
These traps slow the surge enough to allow the air pass by up the stack.
Not exactly part of the intent of this post, I know, but perhaps useful info to some.
Regards,
JD
__________________
Jeff & Cindy
'09 27FB Flying Cloud;'82 31 International
'91 350 LE MH; '21 Interstate 24GT
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06-06-2013, 10:10 AM
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#9
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Rivet Master
2012 28' International
Olympia
, Washington
Join Date: Sep 2012
Posts: 773
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Quote:
Originally Posted by perryg114
That would be my concern. Once a layer of funk accumulates in this thing it won't work. Anyone who has ever cleaned a p-trap in a bathroom sink knows what I am talking about. Those flapper things are going to get covered in gunk and won't seal. Also if they are plastic they won't last forever. Whatever you use, make sure you can get to it, because it will fail at some point.
Perry
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I'm not too worried about stuff plugging up the drains in my AS since I'm careful not to run anything down my sinks except water. Sure some stuff will get in there, but I'm not rinsing stuff off my dishes. I wipe them off before I rinse them to keep stuff out of the grey tank. Since I do this anyway I think the Hepvo will work well for me.
__________________
Dave
2014 Ram 2500 CTD
Pro Pride
Centramatics
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06-06-2013, 06:43 PM
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#10
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2 Rivet Member
1969 27' Overlander
St. Louis
, Missouri
Join Date: Apr 2013
Posts: 74
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Thanks for the input folks! Check out the FAQ section of the link, seems to answer a lot of the worries, but I am a skeptic. I've cleaned many traps and the amount of hair and grime in them can be scary, but as long as your careful, it seems like it would hold up. Hepvo Waterless Valve
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06-06-2013, 07:01 PM
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#11
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Restorations done right
Commercial Member
1962 26' Overlander
1961 26' Overlander
Vintage Kin Owner
Currently Looking...
Baltimore
, Maryland
Join Date: Aug 2007
Posts: 5,545
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I use them on every job coming through my shop. They work great.
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06-06-2013, 08:11 PM
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#12
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Rivet Master
1964 17' Bambi II
Vintage Kin Owner
Schererville
, Indiana
Join Date: Jul 2005
Posts: 2,637
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We put them in the galley & shower of our Bambi II. While we've only gone out with it once, it worked well. The install is pretty slick!
We did make them readily accessible
__________________
Becky
1964 Bambi II
1988 Avion 32S
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06-06-2013, 08:25 PM
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#13
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2 Rivet Member
1969 27' Overlander
St. Louis
, Missouri
Join Date: Apr 2013
Posts: 74
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Thanks Becky the pictures look great. Getting access in case of failure is one worry I have. Did you install a belly pan, and did you make an access in the pan if so?
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06-06-2013, 08:43 PM
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#14
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Rivet Master
1964 17' Bambi II
Vintage Kin Owner
Schererville
, Indiana
Join Date: Jul 2005
Posts: 2,637
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Quote:
Originally Posted by Noco
Thanks Becky the pictures look great. Getting access in case of failure is one worry I have. Did you install a belly pan, and did you make an access in the pan if so?
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Yes, I installed a belly pan, and yes, I made it in accessible sections in the rear. Nothing wrong with having numerous sheets, as long as you have the overlaps facing the rear so water won't wash up off the road while traveling & into the seams.
__________________
Becky
1964 Bambi II
1988 Avion 32S
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06-06-2013, 09:00 PM
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#15
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2 Rivet Member
1969 27' Overlander
St. Louis
, Missouri
Join Date: Apr 2013
Posts: 74
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Did you install a grey and black tank? Do you have any pictures of those, thanks again!
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06-06-2013, 09:29 PM
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#16
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Rivet Master
1964 17' Bambi II
Vintage Kin Owner
Schererville
, Indiana
Join Date: Jul 2005
Posts: 2,637
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Quote:
Originally Posted by Noco
Did you install a grey and black tank? Do you have any pictures of those, thanks again!
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You can see the grey tank to the left of the hevpro drain (which comes out of the shower) The black tank is above the floor & is directly above the main dump valve. The grey & black tie in together at the one dump valve you see to the right.
__________________
Becky
1964 Bambi II
1988 Avion 32S
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