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The Wilkins ZW4000-S is a Pressure-Tru™ fire hose pressure reducing standpipe valve designed for CLASS I and CLASS III systems, regulating pressure under both flow and no-flow conditions with maximum reliability.

Key Specifications:

• Size: 2 1/2 Inches
• Maximum Inlet Pressure: 250 psi
• Inlet Connection: FNPT or Grooved
• Outlet Connection: Male Hose (NH)
• Notable Certifications: UL and C-UL Listed

Other Related Variants:

• ZW4000-O: 400 psi max inlet pressure version
• ZW4000-P: 360 psi max inlet pressure version
• ZW4000-Q: 310 psi max inlet pressure version
• ZW4000-R: 290 psi max inlet pressure version
• ZW4000-T: 225 psi max inlet pressure version
• ZW4000-U: 200 psi max inlet pressure version

Materials:

• Cast Bronze (ASTM B 584)
• Buna Nitrile Elastomers (FDA approved)
• EPDM Elastomers (FDA approved)

Typical Installation:

The Zurn ZW4000-S is listed as a standpipe valve for individual hose stations in CLASS I and CLASS III fire protection systems. It is designed for installations requiring pressure regulation under both flow and no-flow conditions in commercial, industrial, and high-rise building fire suppression systems.

Standards Compliance:

UL Listed; C-UL Listed; NYC MEA 325-06-E; City of Los Angeles Approved

Features & Benefits:

• Dual Flow Regulation: Regulates pressure under both flow and no-flow conditions for consistent performance.
• Factory Pre-Tapped: Comes factory tapped and plugged for pressure gauges at inlet and outlet for easy monitoring.
• Durable Bronze Construction: Cast bronze body (ASTM B 584) ensures long-lasting durability in demanding fire protection applications.
• Flexible Configuration Options: Available in angle or in-line body styles with FNPT or grooved inlet connections to suit various installation requirements.

FAQ

Q: What is the maximum inlet pressure for the Wilkins ZW4000-S?

A: The ZW4000-S has a maximum inlet pressure rating of 250 psi, ensuring safe operation while maintaining a maximum outlet pressure of 175 psi.

Q: Can this valve be tested hydrostatically at higher pressures?

A: Yes, the inlet side of the valve can be safely tested up to 400 psi during system hydrostatic leak testing.

Q: What connection types are available for the ZW4000-S?

A: The valve is available with either female NPT (FNPT) or grooved inlet connections per AWWA C606, and features a male hose (NH) outlet connection per NFPA 1963.

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