Grey tank stopped up won't drain
we have always left our grey and black tank valves open as we are full timers [living at a campground 365/24-7] for past 4yrs. This problem of the grey tank getting stopped up only started last month...
Forum Discussion
My bet is some solids have migrated down the drain line and are blocking the gray line. Especialy if the grey connects to the main 3" line in an elbow.
