Water leak

[cptngym]

While doing the black tank flush I experienced a water leak in the upper right hand area of the bay where the hot and cold lines go up to the bathroom. No water issues in bathroom or under the vanity. Is there a "anti-siphon" valve somewhere on the line from the hose inlet to the black tank? I was told that is a likely cause of this issue by a RV tech in the park.

[Long Island Mac]

Check under bathroom sink. You migt have (required after 2004) a vacuum breaker there. If so, there is a fresh water line up, the breaker, and same fresh water line back down. My breaker leaked, but flodded the bath and more. A small leak might run down the lines, which is the black tank flush valve. good luck!