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ADKDave's avatar
ADKDave
Explorer
Nov 14, 2015

Bizarre holding tank problem! It fills up on its own!

I consider myself a fairly astute guy. I can figure out most issues with everything from old trawlers to this POS 1994 Fleetwood Bounder. The gray water tank fills up on its own. Seriously. Ly...
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MrWizard's avatar
MrWizard
Moderator
Nov 14, 2015
Back flow check valve ?
You got a bypass situation somewhere
Time to trace your plumbing with a stethoscope while listening for the water flow, you can get a cheap engine mechanic steh at harbor freight

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