Anti siphon valve for black tank flush
2012 FR Surveyor SV264RK. Can't seem to locate anti-siphon valve for black tank flush. I know what it looks like but it is not under sink in bathroom. When I use BT Flush I get water running from b...
Forum Discussion
enblethen wrote:
OP asked about anti-siphon for black water flush. This is also known as a backflow
preventer. It is in-line with the flush line.
It is not an air gap. The tank is vented through the roof.
They used to be a vacuum breaker but it looks like the newer ones are just a check valve. More cost cutting.
