Backflow Reference Manual - Conbraco/Apollo

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4W-500 / SVB / SVB-4W


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


This is a spill resistant pressure vacuum breaker. Production began in 2000. The body is made of a noryl plastic with integral ball valves. The check valve is of modular construction.


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.