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01-12-2016, 09:03 PM
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#1
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Member
Join Date: Jun 2015
Location: Chattanooga tn
Posts: 37
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Black tank Mystery
OK guys figure this out when my black tank gets maybe a week usage all pee and water as I use the bath house toilet the grey water comes up in the lowest point which is the shower drain and as soon as I drain my black tank all is fine and no grey water from either of the two sinks comes up in shower. That don't make any sense to me as the black tank should be separate from the grey tank and the only water coming up in shower is from the sinks. sure would like to know what is going on here any help is appreciated . 
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01-12-2016, 09:09 PM
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#2
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,903
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Sounds like your shower is plumbed into the black tank. Some RV mfgrs. do that because some RV owners do not add enough water to the black tank to prevent clogging.
Foretravel MH's only have one waste tank, but I think yours has at least one black and one grey tank.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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01-12-2016, 09:21 PM
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#3
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Quote:
Originally Posted by Ray,IN
Sounds like your shower is plumbed into the black tank. Some RV mfgrs. do that because some RV owners do not add enough water to the black tank to prevent clogging.
Foretravel MH's only have one waste tank, but I think yours has at least one black and one grey tank.
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I'm surprised that Foretravel would do that. Seems like a violation of some states sanitation laws as well as RVIA standards. But I could be wrong as I've never really researched it.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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01-12-2016, 10:22 PM
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#4
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Senior Member
Outdoors RV Owners Club
Join Date: Dec 2014
Location: Nowhere, now here. Freedom!
Posts: 4,602
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When my gray tank is full, it will start to come up the shower drain. You said the black tank got a week's usage. How long ago did you drain the gray?
__________________
ORV 19B Full Timer from '15 to '20, '14 Ram 2500 Diesel and a GSD. Vancouver, WA
de K7NOL 146.52Mhz Safety? (CLICK ME!)
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01-12-2016, 10:39 PM
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#5
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Senior Member
Join Date: Nov 2015
Posts: 26,820
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Your Cougar trailer has a 30 gal grey and a 30 gal black so plumbing shower drain to black vs grey would not be out of bounds.
Very easy to check........after dumping both grey & black leave grey tank drain open and go run shower full stream. Does water come out of grey drain?
Then close grey and open black....got water draining now?
Kitchen sink and bathroom sink are typically the highest water users .......most activity.
Plumbing restrictions could also be reason to drain shower to black tank.....easier to run vs plumbing it to grey.
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01-12-2016, 11:17 PM
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#6
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Senior Member
Join Date: Oct 2012
Posts: 1,194
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Dumb question, is the gray valve closed (i.e. Is the black backfilling the gray?)
__________________
Brian
2016 RAM 3500 6.7L DRW
2018 Chaparral 360IBL, Andersen Ultimate II hitch
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01-13-2016, 02:26 AM
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#7
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,749
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I can't imagine any manufacturer draining the shower to the black tank as the shower is low point and gets any overflow. Yuk... Bathroom vanity yes, some RV are plumbed to the black tank. Our first coach was this way.
__________________
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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01-13-2016, 10:02 AM
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#8
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Member
Join Date: Jun 2015
Location: Chattanooga tn
Posts: 37
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Quote:
Originally Posted by Old-Biscuit
Your Cougar trailer has a 30 gal grey and a 30 gal black so plumbing shower drain to black vs grey would not be out of bounds.
Very easy to check........after dumping both grey & black leave grey tank drain open and go run shower full stream. Does water come out of grey drain?
Then close grey and open black....got water draining now?
Kitchen sink and bathroom sink are typically the highest water users .......most activity.
Plumbing restrictions could also be reason to drain shower to black tank.....easier to run vs plumbing it to grey.
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Thanks for the expert help and I drained both tanks and then left grey tank open and ran shower full blast and no water came out of grey tank however it ran out of black tank and to me that is strange because I have to dump black tank before it is full and every one says to wait until full to dump black tank and that is why the sink water was coming up in the shower . Guess I will just open black tank when shower starts backing up Thanks again for you help.
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01-13-2016, 10:08 AM
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#9
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Member
Join Date: Jun 2015
Location: Chattanooga tn
Posts: 37
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Quote:
Originally Posted by Ray,IN
Sounds like your shower is plumbed into the black tank. Some RV mfgrs. do that because some RV owners do not add enough water to the black tank to prevent clogging.
Foretravel MH's only have one waste tank, but I think yours has at least one black and one grey tank.
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Yes you are correct as I have found out from Biscuit on his post I do have a grey and a black water tank however I now have to drain my black tank before it is full and maybe that is not a problem. Thanks for the help.
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01-13-2016, 10:12 AM
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#10
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Member
Join Date: Jun 2015
Location: Chattanooga tn
Posts: 37
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Quote:
Originally Posted by bjlakatos
Dumb question, is the gray valve closed (i.e. Is the black backfilling the gray?)
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I keep grey valve open mostly and when I close it after a few days there is water in it however I am Not sure if it is black water or grey and it looks like the gray water tank is darker and worse looking that that black tank
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01-13-2016, 10:15 AM
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#11
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Member
Join Date: Jun 2015
Location: Chattanooga tn
Posts: 37
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Quote:
Originally Posted by Ray,IN
Sounds like your shower is plumbed into the black tank. Some RV mfgrs. do that because some RV owners do not add enough water to the black tank to prevent clogging.
Foretravel MH's only have one waste tank, but I think yours has at least one black and one grey tank.
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Well it looks like you are correct however I just don't like it because I have to drain my black tank before it gets full or sink water will come up in shower
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01-13-2016, 10:39 AM
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#12
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Senior Member
Join Date: Nov 2015
Posts: 26,820
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Bathroom sink water comes up in shower.........
Shower water came out of black tank when testing where water drained to......
Sounds like bathroom drains to black tank.....bathroom sink/shower/toilet.
If water is backing up into shower then black tank is FULL
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01-13-2016, 12:55 PM
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#13
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Member
Join Date: Jun 2015
Location: Chattanooga tn
Posts: 37
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Quote:
Originally Posted by Old-Biscuit
Bathroom sink water comes up in shower.........
Shower water came out of black tank when testing where water drained to......
Sounds like bathroom drains to black tank.....bathroom sink/shower/toilet.
If water is backing up into shower then black tank is FULL
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k Biscuit and you must be correct for sure however I never did see and water or sewage in mt toilet and I was thinking I would see it when full however guess not I sure do thank you for the help and great knowledge on these RV "s when I start thinking is usually when I get into trouble any way. Thanks again and have a good rest of the week
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01-13-2016, 01:08 PM
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#14
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Senior Member
Join Date: May 2015
Posts: 165
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Hate to ask something so obvious, but are you sure the tank you have identified as black isn't really the grey and vice-versa?
Rick
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