The Wilkins 1-20XLDULU is a lead-free water pressure reducing valve with an integral strainer, designed to reduce high inlet pressure on potable water service lines with two integral FNPT connections for simplified installation.

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: Two integral FNPT connections

Other Related Variants:

• 34-20XLDULU: 3/4 Inches model size

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 Zurn 1-20XLDULU 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). For pex tube installations, do not exceed the rated pressure or temperature of the tube.

Standards Compliance:

ASSE Listed 1003; cUPC Listed; CSA Certified B356; NSF/ANSI/CAN 61; NSF/ANSI/CAN 372

Features & Benefits:

• Integral Strainer: Filters sediment and debris, making it 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.
• Balanced Stem Design: Enables smooth and responsive reaction to system flow demand changes while providing protection from inlet pressure changes.
• Simplified Installation: Two integral FNPT connections eliminate unions, reducing potential leak points and simplifying piping in tight spaces.

FAQ

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

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

Q: Can this valve 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.

Q: When should multiple valves be installed?

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).

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