So, out I go to drain the black water and after about thirty seconds the flow slows to a trickle and stops. Figuring a blockage, I fire off the flusher, which after about a minute, produces an overflow at the commode and onto the floor as well as a screaming DW. Neither force cup nor snake nor any other device could open the flow so it was a P/C to a plumber with a RV background. He shows up and says. "I hate Keystones". He runs a hose down the commode and up from the sewer outlet. Nothing. Then he drops the belly pan to access the black water valve and drill a 1/8" hole somewhere in the valve body and inserts a coat hanger wire. After a while he yells, "I hit something and it's hard" He bangs on it for a while and suddenly it lets go and whooosh, out goes the black water. Next day he comes back and removes the black pipe but can't grab the object inside the tank. I loan him a spring loaded graber tool and two pair of vice grips and he finally grabs the object but can't pull it through the hole. Hr cuts on it with a sawzall blade until he can bend it in half and finally pulls out...............drum roll please!! The 3" plastic slug the worker bee's drilled in top of the black water tank when they installed the inlet. They let it drop into the tank. It still had the pilot drill hole in the center. Who knows how long it rolled around in the black water tank until it lodged at the outlet valve. Just an FYI if you have an unexplained stoppage............and I'll be contacting Keystone for reimbursement.
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