Backflow Reference Manual - Cla Val

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


The Model D-4 is a double check assembly. Production began in 1991. The 2" size was discontinued in 2003. The 2 1/2"-4" sizes were discontinued in 2005. The 6"-10" sizes were discontinue in 2012. The assembly utilizes the 3084 toggle lever checks as used in the RP4 series. The workings of the 3084 check mechanism are similar to the 3081 design as used in the RP1 series. Changes in the disc, disc retainer, and disc guide were implemented. Most internal hardware parts are made of bronze.


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.