Febco - LF860-QT-FS 2 - 2 IN Lead Free Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Shutoff, Small Diameter, Backflow Flood Sensor P-154FW12-LF a double-beaded diaphragm and a

a double-beaded diaphragm and a captive solenoid plunger

and buttons interface

and the flow-control stem is made of solid

Flow-Shield Technology

Exposed Diameter: 1¾"

Febco - LF860-QT-FS 2 - 2 IN Lead Free Reduced Pressure Zone Backflow Preventer Assembly, Quarter Turn Shutoff, Small Diameter, Backflow Flood Sensor P-154FW12-LF a double-beaded diaphragm and aThis 2 inch lead free reduced pressure zone backflow preventer assembly prevents the reverse flow of high hazard (toxic) fluids found in the water from entering into the potable water supply due to backsiphonage and or backpressure. It is used in water services to industrial plants, hospitals, morgues, mortuaries, and chemical plants. It is also used in irrigation systems, boiler feed, water lines and other installations requiring maximum protection.