WEFLO F1511-300 ALARM CHECK VALVE, UL/FM Listed

WEFLO F1511-300 UL/FM Alarm Check Valve (Vertical Trim, Flange x Flange) The WEFLO F1511-300 is a premium UL-listed and FM-approved alarm check valve built for wet pipe automatic sprinkler fire protection systems. Designed for vertical riser installation, this valve prevents backflow and reliably activates electrical and/or hydraulic alarms on sustained water flow. At NASCO Supply LLC, we stock and supply high-quality fire protection components like the WEFLO F1511-300 at competitive prices to contractors, mechanical contractors, and fire protection professionals across the U.S. Key Features & Benefits 300 PSI Working Pressure — Rated for high-pressure cold water service. Durable Construction — Ductile iron body and cover (ASTM A536 65-45-12) with stainless steel stem, spring, and trim for superior strength and corrosion resistance. Advanced Corrosion Protection — Fusion bonded epoxy (FBE) coated internally and externally. Reliable Performance — Bronze seat with EPDM disc and gaskets for tight shutoff and long service life. Flange x Flange Connections — ANSI B16.1 Class 125 compatible (other end options available). Vertical Trim Package — Includes retard chamber to reduce false alarms. Ideal for commercial, industrial, institutional, and high-rise fire sprinkler systems. Fully certified (UL 193 / FM 1041) and manufactured to the highest industry standards. WEFLO F1511 DATA SHEET