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Old 02-22-2014, 08:30 AM   #1
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Grey water tank

I know about not leaving black water tank open..But what about leaving the grey water tank open ?? (valves)

Don and Maxine McQueen
1996 Damon Intruder
F53 Chassis 33 ft
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Old 02-22-2014, 08:37 AM   #2
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We leave the gray water valve open all the time until the black tank is almost full. Then we close the gray tank valve and take a couple of showers to have gray water to flush the pipes and hose after dumping the black tank.

Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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Old 02-22-2014, 08:59 AM   #3
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Depends. We typically leave grey closed unless both doing showers and will likely fill the tank, and when running the washing machine. We try to ensure we will have ample water to flush the hose after dumping black tank.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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Old 02-22-2014, 09:13 AM   #4
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Both tanks are always closed. Leaving the grey open can result in sewer flies and a potential risk for sewer back up at the park. We pull the grey every morning since full timing for over a year now.
That's just how we roll.
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Old 02-22-2014, 10:15 AM   #5
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Black shut, Grey open, unless we don't.

No rule and the best method is your method, the black tank needs to flush so fill it then pull seems to be the only standard.
I do all my own stunts
03 Dolphin LX 6355, Workhorse W22, 8.1 vortec, 04 CR-V, Blue Ox, Brake Pro----Norm, Barb and
Doc(He's a PhD)
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Old 02-22-2014, 10:21 AM   #6
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Originally Posted by MSHappyCampers View Post
Then we close the gray tank valve and take a couple of showers to have gray water to flush the pipes .....
But what if it isn't the first of the month?
Good Luck, Be Safe and Above All, Don't Forget To Have Fun
2006 Fleetwood Discovery 35H, being pushed by a 2009 Honda CRV
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Old 02-22-2014, 10:23 AM   #7
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I used to leave it opened (gray)until the day before we left and let it get full. Now I keep them both closed because, while leaving a park last summer I saw millions of little fly's, gnats? fly out after I pulled the drain line out of the ground. So that's why I keep mind shut, I don't want them in the MH. Yuck

1982 Pace Arrow 30ft.
KarKaddy SS, Toad:99 Concours
Lilly and Rubie Our 4 legged Kids & Tim & Joe
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tank, water

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