The Wilkins 1-20XLDUC is a lead-free water pressure reducing valve with integral strainer, designed to reduce high inlet pressure to lower outlet pressure on potable water service lines while screening debris.

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 female copper sweat

Other Related Variants:

• 34-20XLDUC: 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 1-20XLDUC 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 Protection: Built-in 300 series stainless steel strainer screens debris and sediment, 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 in closed systems.
• Smooth Pressure Regulation: Balanced stem design enables smooth and responsive reaction to system flow demand changes while providing protection from inlet pressure fluctuations.
• Easy Service Access: Double female copper sweat union connections allow for easy integration into copper piping systems and simplify maintenance without removing the device from the line.

FAQ

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

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 Wilkins 1-20XLDUC be installed in any position?

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

Q: What are the DUC connections on this model?

A: The DUC option provides double female copper sweat union connections, allowing for easy installation and removal in copper piping systems without disturbing the entire line.

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