Backflow Reference Manual - Conbraco/Apollo

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4D-100 / DC-4D


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


This is a double check assembly. Production began in 2003 and was discontinued in 2009. The body is fusion epoxy coated ductile iron. A single access cover on the top is attached with a grooved coupler. Springs are contained when the cover is removed. The modular check mechanism is made of stainless steel and is bolted into the body. The check uses a silicone disc. The check assembly utilizes four springs to achieve a proper loading.


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.