Black Water Flush Leaks

[dandtjackson]

We have a Rockwood 8296 and have found that the black water flush, after it runs for a few minutes, will begin to leak water out the back of the trailer. Not sure where it is coming from. Leak is not at the point where the hose is connected...it is actually at the rear of the trailer, under the bed and into the rear storage compartment. Anyone else having this problem?

[onetonford]

It is possibly the antisiphon valve leaking it has to be mounted higher than the highest point in the blackwater system. Mine is in the wall in front of the toilet. I don't know where yours might be some are located under the sink vanity.
Anyway it is possible that there is something is caught under the small rubber vent and it is not closing off causing it to leak you need to locate the valve and clean it out I think somebody has posted a disassembled valve on another forum. I n fact I think it was Bsmall who is also on this forum. He had the same Issue.

[PatrickCrotty]

I had the same problem. My valve is located behind the bathroom sink. I called my dealer and they shipped me one. It is easy to replace.

[Herk7769]

There are plastic screw on pipe fittings that hold the valve. You should check to see if one is leaking. It could be as simple as tightening the connection.

It is located in the vanity behind the trap in my 5th wheel.

[tomjsas]

I had the same issue last year. The anti-siphon portion of the black flush valve had frozen and developed a small crack over the winter. Things were okay this year...made sure to get some anti-freeze through that valvle when I winterized.