Reliable Model G Grooved Swing Check Valve with ½-Inch Ports

The Reliable Model G grooved swing check valve controls one-way water flow within commercial fire protection assemblies. It integrates into piping networks to prevent reverse flow, utilizing a spring-loaded, non-slamming clapper design that minimizes destructive water hammer events. This component operates reliably in either horizontal installations with the hinge pin positioned at the top or vertical installations featuring upward flow direction.

Engineered to satisfy commercial life safety requirements under relevant NFPA standards for fire suppression and sprinkler systems, this valve ensures code-compliant backflow prevention. Contractors must verify AHJ compliance and match exact nominal or metric ordering configurations—including the 76 mm (76CK), 2½-inch/65 mm (25CKR), or 165 mm (165CK) versions—to the existing pipe schedule prior to mechanical grooved coupling installation.

Key Features & Construction

• Durable Body Construction: Gray-cast-iron body provides rigid structural strength for industrial fire protection environments.
• Corrosion-Resistant Internals: Features a bronze seat, stainless-steel clapper, and EPDM facing seal for secure, long-lasting fluid isolation.
• Water Hammer Mitigation: Spring-loaded non-slamming clapper design protects system piping from pressure surges.
• Auxiliary Port Connections: Incorporates ½-inch NPT supply-side and discharge-side connections as specified in Bulletin 807.
• Flexible Orientation: Installs horizontally with the hinge pin at the top or vertically with upward flow.

Contractors must confirm all local Authority Having Jurisdiction (AHJ) mandates and consult the manufacturer technical data sheets for complete pressure ratings and installation guidelines. Documentation: Download Reliable Model G manufacturer specifications, Bulletin 807 (PDF)