dieharder wrote:
skipro3 wrote:
I have a large wet/dry vacuum. If I had a clogged black water tank, most likely I'd try hooking it up and opening the tank valve. Once I sucked out what ever was clogging, I'd shut the valve and disconnect the vacuum, empty, clean and put it away.
Once you've sucked out whatever is clogging, the rest of what's in the tank would flow out in the rush you regularly hear in your hose before you get to close the valve. Unfortunately, I've had to be there and do that.
I don't know why you were having trouble to close it off. It's just gravity fed. My tank takes several minutes to drain when it's full.
But, in any case, put the vacuum higher than the black tank. Once the clog comes clear, shut off the vacuum and the flow will stop because the hose is higher than the level in the tank.