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06-09-2020, 01:57 PM
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#1
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Junior Member
Join Date: Jun 2020
Posts: 10
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Plumbing
I have a 2020 Coachmen Leprechaun 260DS. My problem is that my kitchen sink is backing up, but if I open the gray water drain, it emtpys out. Does anyone know what is causing this?
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06-09-2020, 02:02 PM
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#2
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Senior Member
Join Date: Mar 2009
Location: Baltimore Md.
Posts: 122
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Is the grey water tank full when this happens?
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06-09-2020, 02:08 PM
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#3
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Junior Member
Join Date: Jun 2020
Posts: 10
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No, it was empty. Someone said something about a vent assist?
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06-09-2020, 02:11 PM
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#4
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Senior Member
Join Date: Jun 2015
Location: Payson, AZ
Posts: 3,874
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most probably you are filling the gray tank. the kitchen sink, the bathroom sink, and the shower all probably drain into the same gray tank.
__________________
2015 cardinal model 3825fl
2015 dodge ram 3500 dually
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06-09-2020, 02:26 PM
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#5
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Senior Member
Join Date: Jan 2020
Location: OREGON
Posts: 132
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You say when you open gray tank valve it drains that's because you letter water out of that tank.as far as vent if you look by drain you will see black pipe with one way valve.
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06-09-2020, 02:30 PM
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#6
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Junior Member
Join Date: Jun 2020
Posts: 10
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The kitchen sink does not have a roof vent like my TT did.
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06-09-2020, 03:11 PM
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#7
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Senior Member
Join Date: Feb 2018
Location: TEXAS
Posts: 9,230
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Quote:
Originally Posted by jerryspark
I have a 2020 Coachmen Leprechaun 260DS. My problem is that my kitchen sink is backing up, but if I open the gray water drain, it emtpys out. Does anyone know what is causing this?
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You might have to take it back to the dealer for warranty work. It's possible that something is stuck in the pipes.
Does the bathroom sink or shower back up? That would give them a place to start. If those are not a problem, then it's the kitchen sink.
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2015 Dynamax REV 24TB class C
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06-09-2020, 03:20 PM
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#8
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Junior Member
Join Date: Jun 2020
Posts: 10
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Bathroom sink and shower do not back up and like I said the kitchen sink drains fine as long as the gray water tank valve is open.
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06-09-2020, 03:36 PM
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#9
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Senior Member
Join Date: Nov 2012
Location: Mount Laurel, New Jersey
Posts: 9,230
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There is an air-admitance valve under the kitchen sink counter. It is more then likely stuck closed. Cheap enough to replace or clean. Takes the place of a roof vent at the sink. Take the valve off, fill the sink then pull the plug. It should drain quickly.. But don't leave the valve off.
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2012 SunSeeker 3100SS Toad-1962 Futura Average 100 + days camping
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06-09-2020, 04:01 PM
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#10
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Senior Member
Join Date: Jul 2015
Posts: 7,053
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Quote:
Originally Posted by A32Deuce
There is an air-admitance valve under the kitchen sink counter. It is more then likely stuck closed. Cheap enough to replace or clean. Takes the place of a roof vent at the sink. Take the valve off, fill the sink then pull the plug. It should drain quickly.. But don't leave the valve off.
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Yup! Either this, or they forgot to install the AAV.
Bruce
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2016 Rockwood Windjammer 3029W Diamond Edition
2015 Chevy 3500HD LTZ 6.0 Crew Cab 4x4 Long Bed 4.10:1 SRW
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06-09-2020, 04:09 PM
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#11
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Junior Member
Join Date: Jun 2020
Posts: 10
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Is this what the air-assist looks like
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06-11-2020, 09:29 AM
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#12
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Junior Member
Join Date: Jun 2020
Posts: 10
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Does anyone know where my air-admittance valve for my kitchen sink is?
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06-11-2020, 09:48 AM
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#13
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Junior Member
Join Date: Jun 2020
Posts: 10
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I can pour 2 gallons of water into my kitchen sink and when I add a third one, it starts to back up. I can let it sit for awhile and nothing happens. Then when I go outside and pull the gray water valve, I get a good rush of water and the sink drains ok until I close the valve and it starts to back up again.
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06-11-2020, 01:37 PM
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#14
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Just as confused as you
Join Date: Aug 2013
Location: south central Wisconsin
Posts: 5,108
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That is a HEPvO trap. From the pic it looks like there isn't a AAV, can you take a picture that shows more of the plumbing?
__________________
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, Seasonal since 2000.
Car Shredder Op/Tech, Scrap Metal Recycling - retired
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06-11-2020, 01:45 PM
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#15
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Senior Member
Join Date: Dec 2012
Posts: 7,652
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How many posts are you going to make with this issue? What about the post titled: Air-Admitance Valve
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