Zurn Wilkins Model 975XLHBM
Zurn Wilkins Hydrant Backflow Meter
Designed for use in measurement of potable water from a fire hydrant or other non-permanent 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" Fire hydrant (inlet) and 2 1/2" Fire hose (outlet). Assembly shall provide protection where a potential health hazard exists.