Backflow Reference Manual - Conbraco/Apollo

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4D-200 / RP-4D


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


This is a reduced pressure 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. The check assemblies are accessed from the top. The modular check mechanism is made of stainless steel and is bolted into the body. Springs are contained when the cover is removed. The check assembly utilizes four springs to achieve a proper loading. The check discs are silicone rubber. The relief valve is mounted under the check body and utilizes an external relief valve sensing line. The relief valve spring is contained when the relief valve cover is removed.


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.