Sewer flush will not work

[Kevin Tate]

I hook my hose to the sewer hose flush and it will not even run in and it will not flush out at all cause the water is not going in any help?

[BFlinn181]

There is an anti-siphon or one way check valve in the line, I'd suspect it is bad. Often the anti-siphon valve is in a sink cabinet above the tank.

[Mr_D]

Is the valve opening to let the sewage out?

[Kevin Tate]

Yes the sewer drains when you open the valve.

[Old-Biscuit]

Originally Posted by Kevin Tate

I hook my hose to the sewer hose flush and it will not even run in and it will not flush out at all cause the water is not going in any help?

Is this on the 2017 ???

Could be that the factory installed the 'anti-siphon vacuum breaker backflow preventer' in BACKWARDS.

It is a one way check valve device typically located under bathroom sink and allows water to only flow one direction (towards tank)

Otherwise nozzle is plugged----highly doubtful on a new rig.

Can be black, white, clear or even brass....all the same device

[Kevin Tate]

Ok i wll look under sink .
Thanks

[Kevin Tate]

2017 keystone hideout

[bdpreece]

Has it ever worked sense new? If not disregard my post. If it has worked in the past then find where the flush enters the top of the tank and remove the fitting (probably two screws). The flush will be blocked with toilet paper and the holes need to be drilled out a little larger than original. Wash clean and reinstall using silicone to seal.

[Kevin Tate]

Never worked

[Daybreak Owner]

My 2020 alpine has two black tanks, and two flush fittings. One works and the other has never worked. I will check that backflow valve tomorrow..