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bobbecky · 02-11-2018, 08:38 PM

Either you have a real problem, or, I'm wondering if you have the black and grey tank drain valves open and have the external drain fitting capped, so when the shower water drains into the grey tank, it is also filling the black tank too?

02-11-2018, 08:38 PM	#2
bobbecky Senior Member Join Date: Jul 2013 Location: Box Elder Posts: 2,910	Either you have a real problem, or, I'm wondering if you have the black and grey tank drain valves open and have the external drain fitting capped, so when the shower water drains into the grey tank, it is also filling the black tank too? __________________ Bob & Becky 2012 3402 Montana 2012 Chevy 2500HD D/A CC