Backflow Preventer/Anti Siphon Valve

TomT

Member
Hi I'm new to the forum. We have a Bighorn 3600R/L 5th Wheel.
When flushing our black water tank, we suddenly heard water gushing inside the wall near the door:eek:. I shut the water off and after cleaning up finally found the source. The top of the Backflow Preventer/Anti Siphon Valve had come off. This is a fitting that the plastic flush line screws onto and has a vertical plunger and a horizontral ball and spring.
I can't find a replacement part!! The fitting is labeled R&B Model 571 110F 125PSI 1/2"

Any help locating a replacement part would be appreciated.
 

sailorand

Past British Columbia Chapter Leader
Tom
I had to replace my anti siphon valve last year. Got it from a plumbing dealer for $96. Solid brass to boot. Home depot did not carry it in Palm Springs.
 
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