ASSE 1066-2023
Performance Requirements for Individual Pressure Balancing In-Line Valves for Individual Fixture Fittings

ANSI Approved: December 2022

This standard applies to automatic pressure balancing in-line valves for individual fixture fittings that are used to equalize incoming hot and cold water line pressures for the purpose of minimizing mixed water temperature variations due to pressure fluctuations when used in conjunction with a mixing valve or two handle valve set. They are not designed to limit the maximum outlet temperature at the point-of-use. These devices are intended for use with individual plumbing fixture fittings used with showers, bathtubs, utility sinks, and shampoo sinks.

A downloadable version of this standard is also available.