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02-22-2017, 10:07 AM
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#1
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New Member
Join Date: Jan 2011
Location: Spokane
Posts: 3
M.O.C. #11033
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Clogged gray water line
What is a safe way go unclog a gray water line? Can you use Draino or something like it?
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02-22-2017, 10:24 AM
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#2
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Montana Master
Join Date: Jan 2016
Location: STAYTON
Posts: 1,118
M.O.C. #18157
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Seems an RV product tank additive like Digest-it would work if left in the system for a day or two?
Mark
__________________
“Hard times create strong men, strong men create good times, good times create weak men, and weak men create hard times.”
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02-22-2017, 11:01 AM
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#3
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Montana Master
Join Date: Feb 2005
Location: Haysville
Posts: 4,261
M.O.C. #3085
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Snake it if you can get it to head the right way. I dunno if you are talking about from the sink to the tank or from the tank to the dump valve.
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02-22-2017, 01:00 PM
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#4
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Montana Master
Join Date: Feb 2003
Location: Englewood
Posts: 3,095
M.O.C. #164
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You may have a bad Dump Valve!
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02-22-2017, 01:56 PM
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#5
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,166
M.O.C. #6433
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I am curious as to why you think it is clogged. The only reason I ask is because some people have thought they had a clogged grey tank when actually they did not know they had two grey tanks and were not pulling both handles.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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02-22-2017, 05:56 PM
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#6
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Montana Master
Join Date: Feb 2005
Location: Haysville
Posts: 4,261
M.O.C. #3085
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Bill ... good point!
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02-22-2017, 05:59 PM
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#7
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Montana Master
Join Date: Dec 2009
Location: Sebring
Posts: 3,659
M.O.C. #9969
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On these RVs don't try and Snake a Clog from the drain side. They do not use a typical "P" or "S" trap, instead they use a straight section with a rubber flap or tube type devise that lets water pass through but is support to suppress reverse gases.
If you use a snake you'll destroy that devise and end up with unwanted ordors in the Rig.
__________________
Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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02-22-2017, 09:36 PM
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#8
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Montana Master
Join Date: Feb 2005
Location: Haysville
Posts: 4,261
M.O.C. #3085
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Although a good point to bring up ... the HepvO waterless p-trap mentioned above is only used on the shower (at least on my fiver) ... under your bath and kitchen sink is a regular p-trap just like in your stick house. If your galley grey tank is the one you think is clogged ... it has it's separate dump valve just like Bill mentioned earlier. It's usually located about midway in your frame's I-Beam either behind or in front of your axles street side.
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03-11-2017, 08:24 AM
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#9
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Seasoned Camper
Join Date: Feb 2012
Location: Alexandria
Posts: 82
M.O.C. #12203
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Which Hepvo Valve?
I am preparing to replace the Hepvo valve , just recently discovered that there are two sizes available. 1 1/2 inch and 1 1/4 inch.
I would like to order the correct one, your expert advice is solicited.
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03-11-2017, 03:02 PM
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#10
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Montana Master
Join Date: Apr 2013
Location: Arroyo City
Posts: 3,110
M.O.C. #13395
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Quote:
Originally Posted by julswa
What is a safe way go unclog a gray water line? Can you use Draino or something like it?
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Try backflushing it. There have been reports of cut out getting lodged on tank drain opening
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03-16-2017, 03:04 PM
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#11
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Established Member
Join Date: Aug 2015
Location: Troutdale
Posts: 26
M.O.C. #17731
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Just had this happen, baking soda and vinegar did the trick.
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