I to have a seperate old cheap gray hose(Sears) attached to the black flush. I don't think there is a check valve on the black flush as i mentioned it shoots water out 2 or 3 feet...hence the gray hose..Just "Y"it off the C.G post and turn it on when needed. I have a plan when at the service center..I am going to hook up the water to the black flush then tell the service center tech that there is a problem with the black flush..when he says what.. i say ..take the hose off..when it nails him in the chest..i say... that's the problem.
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