4" Double Check Valve Assembly OSY Female x Grooved

The 4" Double Check Valve Assembly OS&Y Female x Grooved by Zurn Wilkins functions as a robust backflow prevention device engineered to safeguard potable water supplies from contamination in commercial, industrial, and municipal fire protection systems. Installed within water supply lines, it relies on two independent check valves to establish a dependable physical barrier against backpressure and backsiphonage.

This assembly incorporates a low-pressure loss configuration that sustains optimal water pressure and flow rates across fire suppression equipment. The unit features accessible internal components to streamline routine servicing, minimizing system downtime and maintenance overhead in demanding commercial environments.

Key Features & Construction

• Corrosion-Resistant Body: Constructed from durable materials engineered to withstand harsh fire protection environments and deliver long service life.
• OS&Y Female x Grooved Connections: Integrates an Outside Stem & Yoke design with grooved fittings to provide secure pipe integration and straightforward visual valve position inspection.
• Double Check Valve Technology: Utilizes two independent check valves to create a reliable barrier against water contamination.
• Low-Pressure Loss: Engineered to maintain optimal flow and pressure characteristics to support fire suppression performance.
• Standard 4-Inch Sizing: Built for compatibility across a wide range of commercial and municipal piping layouts.

Technical Specifications & Compliance

Contractors must verify local Authority Having Jurisdiction (AHJ) mandates and consult the manufacturer technical data sheet prior to starting installation.

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