Slow Gray Tank Drain

RVFun4Us

Well-known member
On our first trip out in our 3055RL Bighorn, one of the problems we had was the very slow drain when dumping our gray water tanks. After some experimenting, I figured out that when the tanks are not full, they drain very slowly (about like a garden hose) but when full, they dump very quickly. I would usually wait to dump if on a full hookup until the tanks are full but that doesn't work when enroute somewhere. Has anyone else had this same problem and if so, what did you do?
 

ChopperBill

Well-known member
I am guessing the kitchen drain is running up hill some what. I think mine is. It is ALWAYS slow. When I drain the tanks now I park where the dump valves are at least 6 or more inches lower. Pretty easy to do as I drain at home next to the curb with a Flo jet sewer pump. Mine seems to drain all the gray out that way.
 
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