Backflow Reference Manual - Conbraco/Apollo

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4S-200 / RP


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


This is a reduced pressure assembly. Production began in 2000. The 2 1/2"-4" were discontinued in 2003. The 6"-10" were discontinued in 2006. The check body is ductile iron and is fused epoxy coated. The checks are a swing style and modular in construction. On the 2 1/2"-4" the first check was made of bronze and the second check was made of glass filled noryl. On the 6"-10" sizes both check modules are made of bronze. The spring is contained when the covers are removed and the check seats are replaceable. The relief valve is a bronze body housing mounted under the check body. The relief valve utilizes an internal sensing line. The relief valve spring is contained when the cover is removed but must be released to repair the relief 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.