4" Double Check Detector With FXG OSY LF Fire System

Protect your commercial fire sprinkler system and safeguard potable water with this 4" double check detector. It integrates reliable backflow prevention and precise flow monitoring into one unit to simplify mechanical room setups.

• Duble Check Modules: Built from glass-filled Noryl thermoplastic to provide dimensional stability under varying water pressures.
• Corrosion-Resistant Internals: Utilizes 300-series stainless steel springs and fasteners for lasting performance in wet conditions.
• Reversible EPDM Seats: Features field-replaceable elastomer discs that create a tight, leak-free seal and extend service life.
• Integrated Flow Detector: Combines a lever-operated valve and test ports to enable quick isolation and easy testing without disrupting system function.
• Robust Body Construction: Constructed from ASTM A536 ductile iron with a fusion-bonded epoxy coating to withstand corrosive environments.
• Regulatory Compliance: Meets UL 1469, FM Approved, ASSE 1015, AWWA C510, NFPA 13, and NFPA 25 requirements.
• Operating Ratings: Handles pressures up to 175 PSI and temperatures ranging from 33°F to 140°F.
• Installation Flexibility: Supports ANSI B16.1 flanged or AWWA C606 grooved connections in both horizontal and vertical upward flow configurations.

The built-in detector eliminates the need for separate flow switches so you can reduce installation complexity. Pre-drilled test cocks let you run differential pressure checks quickly for routine maintenance.