Backflow Prevention · Ships Nationwide

Reduced-Pressure (RPZ) Backflow Assemblies

Reduced-pressure (RP/RPZ) backflow assemblies for high-hazard irrigation connections, from Febco, Watts and Apollo. Also sold as an RPZ backflow preventer.

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Reduced Pressure Backflow Preventer

Reduced Pressure Backflow Preventer

Reduced-Pressure (RP / RPZ) Assemblies

A reduced-pressure principle assembly (RP, also called RPZ) is the highest level of backflow protection. It is required for high-hazard connections and anywhere back-pressure is possible. It pairs two check valves with a differential relief valve that discharges water if either check fails, so it must be installed above grade with clearance for the relief drain and can never sit in a pit or box. Febco and Apollo assemblies are stocked here.

RP assemblies are testable, and most jurisdictions require certified testing at installation and annually; protect the exposed body from freezing. For lower-hazard connections a double-check or PVB may be permitted. Confirm with your water authority and see the backflow buying guide.

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