NOTICE: Product images may vary from the actual item due to differences in size or configuration options.

The Wilkins ZW4004GSS-U is a Pressure-Tru™ automatic fire control pressure reducing valve designed for reliable fire protection in sprinkler systems.

Key Specifications:

• Size: 2 1/2 Inches
• Maximum Inlet Pressure: 400 psi
• Connection Type: Grooved AWWA C606
• Notable Certifications: UL, C-UL, NYC MEA
• Supervisory Switch: 3 A @ 125 VAC

Other Related Variants:

• ZW4004GSS-Q: Pressure setting Q
• ZW4004GSS-R: Pressure setting R
• ZW4004GSS-S: Pressure setting S
• ZW4004GSS-T: Pressure setting T

Materials:

• Cast bronze ASTM B 584
• Buna Nitrile elastomers (FDA approved)
• EPDM elastomers (FDA approved)

Typical Installation:

The Zurn ZW4004GSS-U is listed as a floor control valve, an indicating valve, and a check valve in automatic sprinkler systems as well as a standpipe valve for CLASS I and CLASS III systems.

Standards Compliance:

UL Listed; C-UL Listed; NYC MEA 325-06-E; City of Los Angeles Approved; California State Fire Marshal Listed

Features & Benefits:

• Pressure Regulation: Regulates pressure under both flow and no-flow conditions for consistent system performance.
• Integral Supervisory Switch: Includes listed supervisory switch with tamper-resistant cover for enhanced monitoring and security.
• Factory Set & Non-Adjustable: Pre-configured pressure profile eliminates field adjustment requirements and ensures proper operation.
• Comprehensive Monitoring Ports: Tapped and plugged ports for pressure gauges enable easy system diagnostics and open/close indication.

FAQ

Q: What is the difference between the pressure setting profiles (Q, R, S, T, U)?

A: Each pressure setting profile corresponds to different inlet/outlet pressure characteristics. Profile U has a maximum inlet pressure of 200 psi, while profiles Q, R, S, and T have higher maximum inlet pressures ranging from 225 to 310 psi. Consult the residual pressure charts to select the appropriate setting for your system requirements.

Q: Can the Wilkins ZW4004GSS-U be field adjusted for different pressure settings?

A: No, the ZW4004GSS-U is factory set and non-field adjustable. The valve is configured with a specific pressure profile (U in this case) at the factory to ensure reliable performance and compliance with fire protection standards.

Q: What systems is this valve approved for?

A: The Zurn ZW4004GSS-U is approved for use as a floor control valve, indicating valve, and check valve in automatic sprinkler systems, as well as a standpipe valve for CLASS I and CLASS III systems. It carries UL, C-UL, NYC MEA 325-06-E, and California State Fire Marshal approvals.

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