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09-05-2017, 08:53 PM
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#1
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Senior Member
Join Date: Aug 2017
Posts: 292
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Grey Tank Back Up
In our previous trailer, when the grey tank filled, it would back up into the shower. In our new Windjammer 3006wk, the water backed up into the bathroom sink, but no water backed up into the tub. Shouldn't the water back up into the tub first, since it is lower than the sink?
As soon as I drained the grey tank, the water drained out of the sink, but I still don't understand why it didn't back up into the tub. Any thoughts?
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2017 Rockwood Windjammer 3006WK
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09-05-2017, 09:01 PM
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#2
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Senior Member
Join Date: Jul 2010
Location: Waynesville
Posts: 14,428
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I am just throwing this out there,open the door under sink and see if there is a Funny looking vent under there,it could be stuck,causing the Sink Only to Backup? Just a WAG! Youroo!!
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09-05-2017, 11:21 PM
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#3
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Senior Member
Join Date: Jan 2016
Location: Apollo, PA
Posts: 588
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I think someone on this forum said in a post that their shower dumped to the black tank. Can't remember where I saw it or what model it was.
I found it! Search "Shower drains in black tank". I can't figure out how to give you a link.
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2017 Rockwood 2703WS - Sold
2015 Keystone Sprinter 333FWFLS
2017 F250, 6.2 Gas, 3.73 Axle, 2902 lb Payload
If women don't find you handsome, at least they should find you handy!
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09-05-2017, 11:39 PM
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#4
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Senior Member
Join Date: Jan 2016
Location: Apollo, PA
Posts: 588
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Make sure the black tank valve is closed then open your gray water drain valve and run water in the shower to see if water is coming out of the gray tank dump.
When our gray tank overflowed because the shower head leaked all night, the shower overflowed like your previous trailer. We couldn't hear it dripping because the shower head was hanging down. The button on the head was used to turn the water off but the valves were open. Always turn the valves off.
__________________
2017 Rockwood 2703WS - Sold
2015 Keystone Sprinter 333FWFLS
2017 F250, 6.2 Gas, 3.73 Axle, 2902 lb Payload
If women don't find you handsome, at least they should find you handy!
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09-05-2017, 11:54 PM
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#5
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Senior Member
Join Date: Sep 2015
Location: SF Bay Area
Posts: 849
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On ours, the bath tub backs up, it just happened about an hour ago...
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2016 Windjammer 3006WK - Sold July 2018
2002 Lance Lite 835EC TC - Sold July 2015
2010 Dodge Ram 2500, 4x4, Diesel, Front Hitch, Air Lift 5000 Rear Air Bags, Sold Mar 2019.
MISSION COMPLETED!
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09-06-2017, 03:23 PM
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#6
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Senior Member
Join Date: Jul 2015
Location: Albuquerque
Posts: 206
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Mine does that too (the shower does fill up from the shower hose). I think since the gray tank is full, the air pressure keeps sink trap from draining, so it causes the water to stay in the sink. This is how I can tell that the gray tank is full (nothing like in the middle of brushing your teeth and the sink starts to fill) . Once I drain the gray tank the sink empties. The kitchen sink also fills up.
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2015 Flagstaff 32IKBS
2008 F350 6.4
1999 Palomino Filly Popup (my daughter's now)
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09-06-2017, 03:36 PM
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#7
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Senior Member
Join Date: Jul 2013
Location: Phoenix
Posts: 293
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I guess I have a unit that is plumbed "normal". I 3/4 time in my 340RK and while in the camper, I leave the gray water tank valve open as the sink and shower exit there. Never have an issue with smells or backups. The Loo empties into the black tank and I empty that weekly and keep the valve closed except when emptying. At 10 months 3/4 timing all is good.
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Alan
2012 Ram 3500 DRW Crew Cab, 6.7 HO Cummins
2014 Columbus M-340RK
'69 Chevy C-10, 396BB
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09-06-2017, 04:12 PM
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#8
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Junior Member
Join Date: Jul 2014
Location: Manassas, Va
Posts: 11
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Hepvo Valve
If you have a Hepvo valve in the shower instead of a P-trap the water backing up in the shower may be stopped by the valve's diaphragm.
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09-06-2017, 08:21 PM
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#9
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Senior Member
Join Date: Aug 2017
Posts: 292
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Quote:
Originally Posted by NicknTina
If you have a Hepvo valve in the shower instead of a P-trap the water backing up in the shower may be stopped by the valve's diaphragm.
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Does Rockwood install these? We have a 2017 Windjammer.
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2017 Rockwood Windjammer 3006WK
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09-06-2017, 09:47 PM
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#10
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Canadian Member
Join Date: Feb 2012
Location: Eastern GTA, Ontario, Canada
Posts: 6,229
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According to the FR specs, your Windjammer 3006WK has 90 gallons of grey tank capacity which means it has 2 grey tanks. It's possible that the shower is connected to one grey tank and the bathroom sink is connected to the other tank. That would be odd since the shower is located between the bathroom sink and the kitchen sink, but stranger things have been done. Of course it's also possible, as others said, that the shower is plumbed to drain into the black tank.
Presumably with 2 grey tanks you have 2 grey water dump valves. If you do, you could do some experimenting by using a clear bend at the sewer connection and put water into the shower and the sinks to see which tank each fixture is plumbed to drain into.
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2023 Rockwood Signature 8262RBS
2016 Ford F-250 XLT SuperCrew, 6.2L, 4x4, 6'9" bed
2019 Rockwood Signature 8290BS (2019 - 2022)
2011 Rockwood Signature 8293SS (2015 - 2018)
2010 Rockwood Roo 23SS (2012 - 2014)
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09-07-2017, 05:36 AM
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#11
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Senior Member
Join Date: Jul 2010
Location: Waynesville
Posts: 14,428
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Quote:
Originally Posted by dankirk
Does Rockwood install these? We have a 2017 Windjammer.
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I wish they would,on most "Rockwood/Flagstaff" units they Cut a "BIG Hole" in the Floor for the Shower P-Trap! This leads to Many Issues of shower pan & drain! The "Hepvo Valve" does NOT require the Floor Cutout,BUT the Issue Might be the "P-Trap costs 3.50$ and the Hepvo Trap costs 35.00$? This is just a WAG why they don't use the Hepvo Trap! Youroo!!
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