The Wilkins 1-20XLDU is a lead-free water pressure reducing valve with an integral strainer, designed to reduce high inlet pressure on potable water service lines while filtering debris and sediment.

Key Specifications:

• Size: 1 Inches
• Maximum Working Water Pressure: 300 psi
• Maximum Working Water Temperature: 140°F
• Notable Certifications: ASSE 1003, cUPC, CSA B356
• Connection Type: Double FNPT Union Connections

Other Related Variants:

• 34-20XLDU: 3/4 Inches version

Materials:

• Main Valve Body: Lead-Free Cast Bronze
• Bell Housing: UV-Resistant Polymer Composite
• Stem: Lead-Free Brass
• Elastomers: EPDM, Buna Nitrile
• Cartridge: Acetal
• Spring: 300 Series Stainless Steel
• Strainer Screen: 300 Series Stainless Steel

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 Model 20XL may be installed in any position. The assembly shall be installed with sufficient side clearance for testing and maintenance. Multiple installations are recommended for wide demand variations or where the desired pressure reduction is more than 4 to 1 (ie: 200 psi inlet reduced to 50 psi outlet).

Standards Compliance:

ASSE Listed 1003; cUPC Listed; CSA Certified B356; NSF/ANSI/CAN 61; NSF/ANSI/CAN 372 (Lead-Free)

Features & Benefits:

• Integral Strainer: Built-in strainer filters sediment and debris, making the Zurn 1-20XLDU ideal for residential and water systems requiring frequent cleaning.
• Thermal Expansion Protection: Direct acting integral by-pass design prevents buildup of excessive system pressure caused by thermal expansion.
• Smooth Pressure Response: Balanced stem design enables smooth and responsive reaction to changes in system flow demand while providing protection from inlet pressure changes.
• Easy Maintenance Access: Double FNPT union connections simplify service and replacement without disturbing piping; assembly is accessible for maintenance without removing device from line.

FAQ

Q: What is the factory preset outlet pressure for the Zurn 1-20XLDU?

A: The valve comes factory preset to 50 psi, with an adjustable reduced pressure range of 25 to 75 psi. Always use a pressure gauge downstream when adjusting to verify correct pressure setting.

Q: Can the 1-20XLDU be installed in any orientation?

A: Yes, the Model 20XL may be installed in any position. Ensure sufficient side clearance is provided for testing and maintenance access.

Q: When should multiple pressure reducing valves be installed?

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

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