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Old 09-07-2015, 05:03 PM   #1
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Grey water and black

I was wondering on my 34rl if the grey water tank runs into the black tank when i pull the valve open on the grey,

reason i'm asking id the CG we was at on this weekend had no septic. after we showerd and almost filled the grey tank, i was going to pull the valve to see if it would transfer to the black water tank.
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Old 09-07-2015, 05:05 PM   #2
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Nope don't work that way. Hope they had a dump station. Later RJD
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Old 09-07-2015, 05:11 PM   #3
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Nope don't work that way. Hope they had a dump station. Later RJD
ya they did, I've got a septic buddy that i ran it into and wheeled it to the dump station

thanks
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Old 09-07-2015, 05:40 PM   #4
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Hmmm... if the grey and black tee into the same pipe where you attach your slinky after their individual gate valves then maybe if you left the cap on and pulled both valves they would equalize levels. However, that would make your life a misery when you finally had to open the cap to dump for real (probably not recommended to mix sewage into your grey tank either).

Just a (nasty) thought experiment.
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Old 09-07-2015, 05:45 PM   #5
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Hmmm... if the grey and black tee into the same pipe where you attach your slinky after their individual gate valves then maybe if you left the cap on and pulled both valves they would equalize levels. However, that would make your life a misery when you finally had to open the cap to dump for real (probably not recommended to mix sewage into your grey tank either).

Just a (nasty) thought experiment.
my cap has it's own valve. as the grey water and black water, plus there is a galley valve farther back on the trailer. might try it next time i get in the situation
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Old 09-09-2015, 10:21 AM   #6
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Buy an additional gate valve and attach this to your main dump line. This way you can open both gray tank valves and the water level will equalize between them. The only issues with this is that when you dump you will not have the gray water available to clean the black water from the sewer line.

This is what I would suggest to buy. http://www.amazon.com/Valterra-T58-T...=rv+gate+valve

With me that is not a real problem since I use a Flush King connection to allow the sewer line to be clean by water form the water spigot.
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