[bill-e]

I've had two issues, the check valve under the sink and a clogged input line. I dry camp alone for several weekends and usually wait for a full hookup site before I dump. This has caused the tank level to rise and back feed into the input line. I've had to drop the colorplast and disconnect the flush input to the tank and clean out both the fixture in the tank by poking at it with a piece of wire and also the external elbow that connects to the line. A crappy situation to say the least.