Backflow Reference Manual - Cla Val

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RP 1 / RP1-EX


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


This is a reduced pressure assembly. The assembly was produced from approximately 1978 to 1990. The 2 1/2"-10" valve consists of two fused epoxy coated cast iron body toggle lever check valves and a bronze body differential relief valve. The 2" size has a bronze body check valve. There are two styles of check rubber discs and the serial numbers are needed to order the correct parts. Assemblies produced after 1986 are the RP1-EX design. The repair parts are the same as the RP1 series. The difference in the two models was the repositioning of the relief valve section below the first check body in the RP1-EX version. The RP1-EX was discontinued in 1990. The RP1 and RP1-EX series used the CDHS 20 relief valve section which can be detached from the check body. The relief valve spring was not contained when the relief valve body was disassembled. Most internal hardware parts in the R.V. are made of stainless steel. The R.V. utilizes a single external sensing line. Check and relief seats are replaceable on the assembly. A seat removal tool is needed to replace the check seats. The RP1 and RP1-EX models utilize the 3081 toggle lever check design. Check springs are not contained when the cover is removed. Most internal check 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.