Black tank Flush not working

[cronedon]

Originally Posted by tomJerram

we have a 2013 3625 RE. The black tank flush is not putting water into the black tank. I have removed the black tank check valve under the sink and replaced it with 2 elbows connected together to complete the circuit. But, still no black tank flush.

Any Ideas?

A friend suggested opening the water line to the black tank flush - only a trickle at the start, till it starts to flush. Fixed my problem. It wouldn’t work if I opened the tap fully at the start.

[daveinaz]

I think I’d try filling the black tank all the way to the top with enzymatic cleaner and warm water so that you see it at the bottom of the toilet. Then let that soak for a long time.

[Hblick48]

Originally Posted by ChuckS

I don’t even use the black tank built in flush port. I use the Valtera clear connection with gate valve and wash port.. all 3 tanks are always clean. Much better way to clean tanks and no worries about check valves or anti siphon valve leaks.

I can physically see when my tanks are clean... all 3 tank level indicators function properly ...

I also found this way to flush much better than the factory flush system. In fact, when I replaced my black tank, I didn't re-install flush wand. Really didn't want to drill a hole (and a possible leak site) in the new tank. I put a plug in the tank rinse pipe so no one can accidentally cause a flood. I had previously bypassed the anti-siphon valve.

I also use a water flow meter so I know how much rinse water has entered the tank. Don't want to over fill.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

[mazboy]

Maybe it is time to not waste your time on flushing this way. If you can't repair it $$$$ just wait until the toilet is nearly full and dump. Then refill and dump again...the old fashion way.



A couple of fill ups/flush will work just fine.