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
Rid X or equivalent should clear a gray water tank with no problem - but it might take a while depending on weather. I use it every few years during warm weather and apply it to gray/black tanks and let it sit a week - seems to purge everything. If gray water blockage is due to grease then warm water and dawn liquid might be a quicker solution.
