Backflow Reference Manual - Watts

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909RPDA / 909 M1 RPDA


2 1/2", 3", 4", 6", 8", 10"


This assembly is a reduced pressure detector assembly. Production began in 1990. The main assembly is similar to the 909 or 909 M1 design. The by-pass design is either the Watts 909 3/4", Watts Model 009 3/4" or the 009 M2 3/4". Check the name plate on the bypass unit to be sure which model you have.


Common repair parts are a very small subset of the 10,000 plus items BAVCO stocks. Please feel free to contact us direct at 800-458-3492 for pricing on items not listed or backflow prevention devices.