1. Application and Scope 1.1 Application
This Standard applies to devices that automatically reduce the initial supply
pressure to a set lower pressure in domestic water systems. It applies to
devices in the size range 1/2 - 2 inches inclusive that are of the direct
acting diaphragm type with a means for adjusting the pressure setting, and are
suitable for use over a hydrostatic inlet pressure range up to 1700 kPa and a
water temperature range up to 82°C. 1.2 Scope
This Standard covers material specifications, construction requirements, and
tests for structural integrity, capacity and reduced pressure deviations, and
instructions and marking.