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10-31-2015, 11:03 AM
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#1
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Montana Fan
Join Date: Mar 2015
Location: SE
Posts: 478
M.O.C. #17167
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Antifreeze drains from black tank flush
Winterized a call weeks ago but didn't have a way to pump Antifreeze into black tank flush. Got a manual winterizing pump and tried to pump Antifreeze in today. Pumped 15% to 20% of bottle...disconnected and all of the Antifreeze ran right back out!!
What am I doing wrong?
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10-31-2015, 11:45 AM
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#2
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,361
M.O.C. #6433
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Sounds like the check valve at the inlet is not closing. But as long as you got antifreeze pumped thru the line the fact it drained back out is not a problem. It just means the line is now empty. It would have displaced any water that was there and could have frozen.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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10-31-2015, 03:06 PM
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#3
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Seasoned Camper
Join Date: Mar 2011
Location: amarillo
Posts: 98
M.O.C. #11197
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We always use a little air to blow thru the line.
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10-31-2015, 03:43 PM
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#4
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Montana Fan
Join Date: Mar 2015
Location: SE
Posts: 478
M.O.C. #17167
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Was planning to blow air thru but have no power at storage lot. Inverter on truck no strong enough to drive compressor
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10-31-2015, 04:35 PM
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#5
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,361
M.O.C. #6433
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I use a spiral water hose that came with the trailer and connect it from the outside shower connection to the flush connection and pump antifreeze thru it after all the other lines are done.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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10-31-2015, 05:56 PM
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#6
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Montana Master
Join Date: Jul 2013
Location: Aguanga
Posts: 606
M.O.C. #13601
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On mine there was no check valve at the inlet from the factory. There is an anti siphon valve 10 odd feet away under the bathroom sink. You should probably find it for the heck of it since they are very prone to leaking.
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11-01-2015, 01:26 AM
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#7
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Montana Master
Join Date: Dec 2007
Location: Kansas City, Missouri
Posts: 2,727
M.O.C. #7992
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My two gallon pancake compressor holds enough air to blow out the black tank flusher. You will hear the water or anti freeze vacate the line into the black water tank. It's not a lot. Just fill your compressor at home and take it to the storage facility. Jim
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2006 3000RK
2009 Ram 2500
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11-01-2015, 03:49 AM
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#8
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Montana Master
Join Date: Feb 2003
Location: Englewood
Posts: 3,095
M.O.C. #164
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13 years never ever added pink stuff or blowed out Black Tank Flush line
Same with my new SOB destination trailer.It is self draining!
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11-01-2015, 04:22 AM
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#9
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,361
M.O.C. #6433
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Quote:
quote:Originally posted by kdeiss
13 years never ever added pink stuff or blowed out Black Tank Flush line
Same with my new SOB destination trailer.It is self draining!
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Here is a picture of my black tank flush line(along with my shower lines). As you can see it has antifreeze in the line after winterizing. It does not drain after I removed the antisiphon valve. And only drained on the tank side of the valve before I removed it.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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11-01-2015, 09:11 AM
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#10
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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In the years we winterized I never did anything with the flush line, but I also had already removed the backflow preventer.
__________________
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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11-01-2015, 09:58 AM
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#11
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Montana Master
Join Date: Feb 2003
Location: Englewood
Posts: 3,095
M.O.C. #164
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Once you remove the supply water hose all the water on that side of the back flow valve will drain out on the other side of the valve will drain into the tank if that is not happing something is wrong!
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11-02-2015, 08:36 AM
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#12
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,361
M.O.C. #6433
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Can't say why mine does not drain. It just doesn't. But there is nothing functionally wrong with it. When I start the flush I can easily hear the water spraying into the black tank and soon after starting it an increase in water flow starts coming out the drain. I would not assume mine is the only one that does not drain.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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