3/4"

The 3/4" Hersey FDC is a double check assembly that was produced from 1975 to 2004. It is a bronze body with platic, self contained check assemblies. Springs are self contained and it has replaceable seats. Hard parts have been discontinued and only rubber repair parts are available. No special tools are required for servicing.

The 3/4" Hersey FRP II Reduced Pressure Zone (RPZ) backflow preventer was produced from 1975 to 2004. Bronze body with plastic modular check assemblies. Check assembles are self contained and seats are replaceable. A special tool is needed to remove the relief valve seat. Hard parts have been discontinued for this model and rubber repair parts are the only parts available.