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Backflow Reference Manual - Backflow Direct

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Deringer 30 / 30X DCDA


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


This is a double check detector assembly. Production began in 2014. The mainline assembly is similar to the Deringer 20DC. The bypass is a type II with a single check piped around the mainline second check. The assembly is designed with an integral butterfly shut-off valve.


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.