scope:

This standard describes ½‑in. (13‑mm) through 6-in. (150-mm) air‑release valves and ½-in. (13‑mm) through 20-in. (500-mm) air/vacuum and combination air valves having gray cast‑iron or ductile‑iron bodies and covers. The valves are designed for use in water systems with maximum working pressures of 300 psig (2,070 kPa [gauge]) and water temperatures ranging from above freezing to a maximum of 125°F (52°C).

Purpose

The purpose of this standard is to provide the minimum requirements for air-release valves, air/vacuum valves, and combination air valves for water supply service, including material, design, inspection, testing, marking, handling, and packaging for shipment.