M2 4-Inch Fire Service Check Valve | SKU 22550

The Viking M2 4-Inch Fire Service Check Valve (SKU 22550) maintains unidirectional water flow in commercial fire protection systems and prevents reverse pressure backflow. Install this inline component within wet pipe, dry pipe, or preaction system piping assemblies to isolate downstream water when system pressure drops occur.

This valve satisfies life safety requirements and complies with NFPA 13 standards for sprinkler system installations, as well as NFPA 25 inspection, testing, and maintenance guidelines.

• Ductile Iron Body: Heavy-duty ductile iron construction delivers high tensile strength and impact resistance for mechanical rooms and riser assemblies.
• Stainless Steel Clapper: Corrosion-resistant stainless steel assembly ensures reliable actuation and prevents binding during high-flow events.
• EPDM Rubber Seal: Resilient EPDM rubber facing provides a tight, leak-free bubble seal against the brass seat under varying system pressures.
• Brass Seat: Precision-machined brass seating surface offers superior wear resistance and prevents corrosion-induced sticking over extended maintenance cycles.
• 4-Inch Nominal Size: Standardized 4-inch sizing integrates seamlessly with commercial fire sprinkler main feeds and backflow loops.

Confirm connection details, materials, operating limits, approvals, and application suitability against local Authority Having Jurisdiction (AHJ) requirements and the manufacturer's technical specifications before finalizing your parts order and beginning installation.

Documentation: Download Manufacturer Technical Data & Cut Sheet (PDF)