Black Tank Vacuum Breaker
A few days ago y'all gave me ideas about why my black tank won't flush. One of the ideas was a vacuum breaker problem. Does the thing in this photo look like a vacuum breaker? How does one ...
Forum Discussion
GPWayne wrote:
From the picture, I would say the black wire tie is putting the Vac-breaker in a bind. It does not take much to jam plastic valves (Over a period of time). I would replace the tie on just one line and see if you can tie the other in a way not to put the valve in a bind.
Now to fix the valve. (With water OFF) Remove the valve, the fittings should be very close to finger tight. If not, that could be part of the problem. When you get it out. Carefully open the check valves (should be easy to tell what is stuck). Lube with plumber's grease ONLY. If it frees up and seems that it should be OK.(If not replace) Reinstall, FINGER TIGHT and leak check.
If you still can't get flush water into the black tank. It's time to attack the check valve where you attach the hose to flush system. That is where I would have started. This check valve normally fails OPEN but you never know. (Make sure you don't have a plugged screen washer, failed pressure regulator or something like that) I also hope your not using your drinking water hose for all this.
Let us know what you find, please.
Thank you. I'm not parked where I have access to water right now (but should be this weekend).
But ... If I shake it, it rattles, which I took to be a good sign that it might be working, and that it might not be the problem.
