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Old 09-08-2016, 10:21 AM   #1
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Transfer gray tank to black

Since our gray tank fills up so much quicker then the black, is there any way to easily transfer water from the gray tank to black?
I have the 195bh with fairly small tanks and would love to extend the length of gray tank without carrying the portable.
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Old 09-08-2016, 12:03 PM   #2
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I don't know of a way to transfer it directly but with a twist-on valve installed you can open both dump valves and let the tanks equalize. So if you have 10 gallons in the black and 20 in the grey you'd end up with 15 in each (probably slightly less since the pipes behind the last valves will hold a bit.
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Old 09-08-2016, 12:25 PM   #3
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MY first inclination was to say that's illegal and you can't do that, but it's rare to have separate dump facilities anymore and if the camper is working properly it will have traps to prevent sewer gasses to back into the RV. So I guess its OK...but I really don't know.

But I still wouldn't do it. Many of the RVs I've seen run a smaller size pipe from the gray tank to the valves. I'm afraid that it could clog with solids and not have the ability to clear because of lack of flow from the tank through where the clog formed.

Maybe in an emergency... But in an emergency there's other ways I'd deal with the extra gray water.

Just my random thoughts on this... I'm no expert here that's for sure.
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Old 09-08-2016, 12:33 PM   #4
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Restcure's solution is good IF your tanks are at the same level. If you open the grey water valve first, and it's fuller than the black, you won't have any backflow into the grey tank, unless you flush the toilet with the valves still open.
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Old 09-08-2016, 12:37 PM   #5
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Quote:
Originally Posted by Golfnbike13 View Post
Since our gray tank fills up so much quicker then the black, is there any way to easily transfer water from the gray tank to black?
I have the 195bh with fairly small tanks and would love to extend the length of gray tank without carrying the portable.
When I had a smaller camper (17-foot Casita) I would sometimes take a small bucket, dump some of the gray tank contents into it and then pour it down the commode. Doing this a few times would accomplish the load-leveling your are talking about. It's a PIA, and you have to be careful toting it through the camper, but I guess it beats having to hook up the camper and tow it to the dump station.

Given the choice, I think I'd purchase one of the blue tanks that can be pulled behind the tow vehicle.
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Old 09-08-2016, 01:58 PM   #6
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On our last trip and with no sewer hook up, we would run what ever water we need to run with a dish pan under it and then put it into the toilet. Since there were bathrooms and shower just a little way down with flush toilets, the black tank was not getting much use. I am a firm believer that having more fluids in the black tank then solids the better. Especially useful if you are in a hot climate.
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Old 09-08-2016, 02:00 PM   #7
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We have one of these and love it

https://www.walmart.com/ip/Barker-42...&wl13=&veh=sem
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Old 09-08-2016, 02:01 PM   #8
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Jesse try reading the original post
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Old 09-08-2016, 02:09 PM   #9
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Oh yeah got it
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Old 09-08-2016, 02:10 PM   #10
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"Without carrying the portable"
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