United Brass Works Model 90 Wafer Check Valve

The United Brass Works Model 90 Wafer Check Valve is engineered to provide reliable backflow prevention in commercial and industrial fire protection water supply systems, as well as general HVAC fluid lines. Designed to install between standard pipeline flanges in tight spaces, this compact wafer-style check valve utilizes a single clapper mechanism to maintain unidirectional flow and positively prevent reverse fluid movement that could compromise system pressure. It is typically deployed within wet pipe fire sprinkler systems, municipal water feeds, and mechanical piping assemblies where space-saving profile constraints and dependable shut-off performance are critical.

This valve is manufactured to satisfy rigorous life safety and property protection criteria, carrying listings and approvals that comply with strict industry installation guidelines. It directly supports compliance mandates outlined in NFPA 13 (Standard for the Installation of Sprinkler Systems) and NFPA 25 (Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems) by ensuring continuous, reliable backflow prevention and minimizing pressure loss during active flow conditions.

• Wafer-Style Body Design: Engineered with a compact profile to fit easily between standard ANSI companion flanges, reducing overall piping footprint and installation labor.
• Single Clapper Assembly: Features a robust single-clapper mechanism that responds rapidly to flow reversals, seating securely to stop backflow.
• Versatile Sizing Options: Available in standard commercial pipe diameters including 4-inch (SKU U90-0400), 6-inch (SKU U90-0600), and 8-inch configurations to match project specs.
• UL Listed & FM Approved: Independently tested and certified for fire protection service, ensuring compliance with strict insurance and code authority mandates.
• Durable Industrial Construction: Built with heavy-duty components designed to withstand continuous operating pressures and demanding mechanical environments.

Contractors must verify all local Authority Having Jurisdiction (AHJ) requirements, seismic considerations, and engineering specifications prior to system installation. Always consult the official manufacturer submittal data sheets for exact torque requirements, face-to-face dimensions, and pressure-temperature limitations matching your specific SKU.

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