The Wilkins 1-600XL is a water pressure reducing valve with integral by-pass check valve and strainer, designed for residential and commercial potable water systems requiring reliable pressure control and protection from thermal expansion.

Key Specifications:

• Size: 1 Inches
• Maximum Working Water Pressure: 300 psi
• Maximum Working Water Temperature: 140°F
• Notable Certifications: ASSE 1003, IAPMO, CSA
• Connection Type: Single Union

Other Related Variants:

• 12-600XL: 1/2 Inches size
• 34-600XL: 3/4 Inches size
• 114-600XL: 1 1/4 Inches size
• 112-600XL: 1 1/2 Inches size
• 2-600XL: 2 Inches size

Materials:

• Main valve body: Low Lead Cast Bronze ASTM B 584
• Access covers: Low Lead Cast Bronze ASTM B 584 / Low Lead Brass
• Fasteners: Stainless Steel, 300 Series
• Stem & plunger: Low Lead Cast Bronze ASTM B 584 / Low Lead Brass
• Elastomers: Buna Nitrile (FDA Approved) / EPDM (FDA Approved)
• Cap gaskets: Natural Vulcanized Fibre / Acetal (Delrin™)
• Strainer screen: Stainless Steel, 300 Series
• Seat: Stainless Steel, 300 Series

Typical Installation:

Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be mounted in accordance with the latest edition of the Uniform Plumbing Code. The Zurn 1-600XL may be installed in any position. If installed in a pit, vault or inside application, specify the "SC" sealed cage option. Multiple installations are recommended for wide demand variations or where the desired pressure reduction is more than 4 to 1 (i.e.: 200 psi inlet reduced to 50 psi outlet). Anytime a reducing valve is adjusted, a pressure gauge must be used downstream to verify correct pressure setting. Do not bottom adjustment bolt on bell housing.

Standards Compliance:

ASSE Listed 1003; IAPMO Listed; CSA Certified; City of Los Angeles Approved; NSF/ANSI/CAN 61

Features & Benefits:

• Integral By-pass Check Valve: Prevents excessive system pressure buildup caused by thermal expansion, providing comprehensive protection.
• Balanced Piston Design: Enables smooth, responsive reaction to system flow demand changes while protecting against inlet pressure variations.
• Built-in Strainer: Integral strainer design makes the Zurn 1-600XL ideal for systems requiring frequent cleaning due to sediment and debris.
• Flexible Installation: Can be installed in any position with separate access covers for easy plunger and strainer screen maintenance.

FAQ

Q: What is the factory preset pressure setting for the 1-600XL?

A: The Wilkins 1-600XL comes factory preset at 50 psi with an adjustable pressure range of 25 psi to 75 psi (standard). A downstream pressure gauge must be used when adjusting the setting.

Q: Can the 1-600XL be installed in a pit or vault application?

A: Yes, the valve may be installed in any position. For pit, vault, or inside applications, specify the "SC" sealed cage option for proper protection and functionality.

Q: What is the maximum pressure reduction ratio recommended for this valve?

A: Multiple installations are recommended for wide demand variations or where the desired pressure reduction is more than 4 to 1 (example: 200 psi inlet reduced to 50 psi outlet) to ensure optimal performance.

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