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11-18-2012, 08:16 AM
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#1
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Established Member
Join Date: Nov 2011
Location: Georgetown
Posts: 43
M.O.C. #11965
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Black tank drain
Traveling and stopped in Richland, Washington, my black tank drain clogged up. I was using enzyme treatment, and the wrong TP...Charmin, which is the one brand they say not to use. I was able to clear the line with a backflush bladder fortunately.
While filling and dumping the tank several times to ensure it was out of trouble, I see it only drains to within about 2.5 inches of the bottom. Is that normal or should it be completely empty when the drain flow stops? When I dump it, it flows with force, so I assume it's supposed to leave some??
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11-18-2012, 09:09 AM
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#2
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Montana Fan
Join Date: Jan 2009
Location: North Vernon
Posts: 261
M.O.C. #9087
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I hope it does not leave some as I would have had a block of ice in mine every winter since '05.
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11-18-2012, 01:45 PM
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#3
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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Just curious, how do you "see" that it only drains to about 2.5 inches of the bottom? I can't see my tanks at all.
__________________
2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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11-18-2012, 03:31 PM
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#4
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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A number of plumbers in KC who make their living digging up peoples lawns and replacing pipe tell me that they love Charmin as it plugs up regular plumbing lines on a regular basis. On the other issue, my black tank drains pretty much empty. Sounds like you may still have a TP buildup near the drain hole.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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11-18-2012, 04:51 PM
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#5
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Established Member
Join Date: Nov 2011
Location: Georgetown
Posts: 43
M.O.C. #11965
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Thanks, and yes Dick, I probably still have some build-up. BTW, a flashlight down the glory hole and a stripped tree branch is my gauge method
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11-19-2012, 01:02 AM
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#6
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Montana Master
Join Date: Apr 2005
Location: Tonawanda
Posts: 551
M.O.C. #3662
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Just before leaving a campground some people pour a small bag of ice down the toilet to break up any solids in the black tank while traveling.
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11-19-2012, 03:02 AM
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#7
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Montana Master
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,773
M.O.C. #12156
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Quote:
quote:Originally posted by WeBeFulltime
Just curious, how do you "see" that it only drains to about 2.5 inches of the bottom? I can't see my tanks at all.
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I am curious as well??
__________________
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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11-19-2012, 10:05 AM
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#8
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Montana Fan
Join Date: Feb 2005
Location: Moultonborough
Posts: 449
M.O.C. #3268
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Where the tanks outlet is on the sides of the tank, and being one who has replaced a tank and tried to repair a tank, there is always some liquid left in the bottom of the tanks.
Before when I winterized the unit, (7th winter in AZ) after everything was drained, I always put a gallon of windshield washer fluid down the pipes so each tank had a gallon of windshield washer fluid in the lowest part of the tank.
Use RV antifreeze in water lines, and use windshield washer fluid in drains (1.00) per gallon.
E. Sven
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