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09-24-2013, 07:58 AM
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#1
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Montana Fan
Join Date: Apr 2009
Location: Albany
Posts: 287
M.O.C. #9222
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Sewer smell in RV
We kept smelling sewer smell in our rv so we kept checking everything and finally figured out that the Hepvo sanitary valve from the tub that goes into the gray tank was messed up. It's a waterless P trap, anyway we tried to find a replacement from 2 rv places here and they both told us they could order for us for $48.00 plus shipping. I decided to order my self and called the company name on the part and was told to go to drainmaster.com to order.....$22.75 plus shipping. No one seems to have this part in stock at the rv stores we went to as supposedly they have never heard of it. So if anyone out there is having that smell in your rv check out this valve first. It's a one way valve that prevents foul odors.
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09-24-2013, 11:10 AM
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#2
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Montana Master
Join Date: Apr 2013
Location: Arroyo City
Posts: 3,110
M.O.C. #13395
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I had a similar problem when mine was new. They put that thing in backwards at the factory
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09-24-2013, 02:27 PM
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#3
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Montana Master
Join Date: May 2010
Location: Rock Island
Posts: 1,074
M.O.C. #10457
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You can easily fix the one you have. Here is my story: We were doing laundry in our previous Monti and had the sewer drain closed and backed up water into the shower and the washer overflowed. The Hepvo valve (waterless P trap) stopped working. I took it off and the flap/rubber tube was doubled up and not allowing water to flow out of shower drain, turned the rubber flap/tube back to the correct position and when reinstalling made sure to replace it with the water flow in the correct direction and all worked well. On a side note while vacuuming out sawdust that was left during the Monti construction from behind the basement wall in our present Monti I found a new Hepvo valve laying next to the drain line where ours is located. Apparently the worker dropped one and just reached an got another rather than searching for the first. I now know that I had found a $22.50 part, and do carry it in the Monti with our assorted plumbing supplies.
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09-26-2013, 09:22 AM
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#4
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Montana Fan
Join Date: Apr 2009
Location: Albany
Posts: 287
M.O.C. #9222
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Thanks for the suggestions, Mark looked before and it was in the right direction. And what a great find!! Always good to have extra parts on hand
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09-26-2013, 02:44 PM
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#5
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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09-26-2013, 03:20 PM
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#6
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Montana Master
Join Date: Apr 2013
Location: Arroyo City
Posts: 3,110
M.O.C. #13395
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Garry, mine drains straight to seer line, not holding tank. I never tried to fix it because I had just bot the Montana
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12-23-2013, 03:35 PM
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#7
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Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
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If it was really a one way valve...we wouldn't be getting the grey tank smell back out of the shower pan drain. Mine has been that way since new. Use of the yellow colored tank chemical has kept this oder at bay most of the time. We were away from the monty for one week during thanksgiving and upon return...during first use of the shower...water didn't drain for a few minutes until it was an inch deep in there. Then there was a noise and water drained away. Hasn't repeated, but still get smell on ocasion. I have been meaning to pull out the wall in the pass-through so I can see under the shower. Wonder why a normal p-trap wasn't used for the shower. Guess I will find out if I pull that panel. John
__________________
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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12-24-2013, 03:19 AM
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#8
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Montana Master
Join Date: Jan 2005
Location: North Ridgeville
Posts: 20,229
M.O.C. #2839
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Check for a leak in the galley or gray tank, Check for a bulge in the under belly indicating it is full of water.
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