ASSE 1013-2026/CSA B64.4:26
Reduced Pressure Principle (RP) Backflow Prevention Assemblies

ANSI Approved: February 2026

This Standard covers reduced pressure principle (RP) backflow prevention assemblies (herein referred to as the “assembly”) that are used in potable water supply systems to prevent cross-connections.

A downloadable version of this standard is also available.