Bigfoot 25RQ black tank draining - Fiberglass RV


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Old 06-23-2013, 09:37 AM   #1
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Name: Joe
Trailer: Bigfoot
Washington
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Bigfoot 25RQ black tank draining

I find when I drain my black tank the process is incomplete and there are a few holdovers (sorry). There is plenty of fluid in the tank and the tank drains fast until the end when it starts to trickle. I drain while the trailer is level.

Are there any tricks of the trade out there? I would like to know where the outlet of the tank is but the bottom is sealed on my trailer. Should I ramp up one side of the trailer or raise or lower my tongue while draining? Are my expectations too high?

Thanks for any help.
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Old 06-23-2013, 09:42 AM   #2
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Name: jim
Trailer: 2016 2ndGen Escape19 Prairie Schooner pulled by 2014 Dodge Ram Hemi Sport
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Drain the trailer unlevel and tilted towards the discharge point. Works every time.
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Old 06-23-2013, 10:16 AM   #3
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Name: Donna D
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Since I always carry an empty 1 gallon milk jug, after I've drained the blackwater tank, I close the valve and pour freshwater in the toilet... maybe a couple of gallons, then drain again. That's not only rinses the tank, but the hose as well. Having a few cups of clean water behind the valve is not problematic, except during a freeze.
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Old 06-23-2013, 05:01 PM   #4
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Name: Bill
Trailer: Bigfoot 25.5 RQ
British Columbia
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How do you know there are "holdovers"?...I have a "clear" fitting for my dump hose so I can see when flushed liquid is getting cleaner....I use my black tank flush whenever possible and open/close/open dump valve about 3 times after main flush is gone, with black flush turned on allowing tank to fill a bit between valve openings, until "holdovers" are gone.....if I cannot use black tank flush, then I dump at least 3 full buckets of water down toilet while dump valve is still open, then 3 buckets water into tank after valve is closed and I am finished dumping so that there is liquid in tank for new load of "holdovers".....
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Old 06-23-2013, 10:50 PM   #5
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Name: Joe
Trailer: Bigfoot
Washington
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Thanks for the help. I also have a clear fitting which alerted me to my problem. I don't have a black tank rinse, wish I did. I've been dragging a hose through the window but maybe will invest in a good bucket.

I'm taking it out in a few weeks and should have some downtime to play with the black tank. I'll try lowering and raising the nose and see if I can find the tank outlet (front or rear) for more thorough draining.
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Old 06-23-2013, 11:57 PM   #6
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Trailer: Bigfoot 25 ft RQ
Missouri
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I put a couple of my leveling boards made from 2 x 8s under the right hand trailer wheels to tip the trailer toward the drain opening. I also carry a plastic five gallon bucket with a snap on lid (multiple uses). I put about four gallons of water in it and carry it inside and give the toilet a couple of good flushes before I close the drain. That gets most of it. I only use the rinse system for final clean out after the trip is over.
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