Watts 2LF919-QT-S-FS 2in FNPT 175PSI Reduced Pressure Zone Assembly

The Watts 2LF919-QT-S-FS is a new, 2-inch lead-free (LF) reduced pressure zone (RPZ) backflow preventer assembly designed for high-hazard cross-connection control in potable water systems. The assembly is rated at 175 PSI working pressure and 200 GPM maximum flow, with FNPT (female NPT) inlet and outlet connections on a lead-free bronze body conforming to NSF/ANSI 61 and NSF 372 standards; the body is also cast with "ASSE 1013" compliance visible on the check valve section, confirming certification to that backflow preventer standard. The "QT" suffix denotes quarter-turn ball valve shutoffs (one upstream, one downstream) with green lever handles and integral test cocks, the "S" suffix denotes a factory-included inlet Y-strainer (NSF 61/372 compliant, visible in photos with male NPT outlet and cleanout plug), and the "FS" suffix denotes an integrated flood sensor/flow switch bracket assembly (the black plastic clamp-on sensor visible in photos with the red "DO NOT DISCARD" tag). Maximum rated temperature is 180°F (82°C). Typical applications include commercial and industrial fire suppression supply lines, irrigation systems, boiler make-up water, and any potable water connection requiring ASSE 1013-compliant RPZ protection.

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