Backflow Preventer With Water Meter and Relief Valve Length_50 Feet Two types of threads are

Two types of threads are used: British Standard Pipe Taper (BSPT) and British Standard Pipe Parallel (BSPP)

Brush firefighting

Includes one inlet and two outlets with gated shut-off ball valves

Single hook spanner head fits 3/4 inch to 6 inch rocker lug or pin lug fire hose or adapter fittings

the AESC became the American Standards Association (ASA)

Backflow Preventer With Water Meter and Relief Valve Length_50 Feet Two types of threads areDesigned for use in measurement of water from a fire hydrant or other nonpermanent installation where flow is in one direction only. Protects against both backsiphonage and backpressure of contaminated water into the potable water supply. NH (NST) adapters allow for connection to 2 1 2 inch fire hydrant (inlet) and 2 1 2 inch fire hose (outlet). Assembly shall provide protection where a potential health hazard exists. Meter Meets the Requirements of: