The Wilkins 1-NR3XLDUPEX is a water pressure reducing valve with integral by-pass check valve and strainer designed for residential and commercial applications.

Key Specifications:

• Size: 1 Inches
• Maximum Working Water Pressure: 400 psi
• Maximum Working Water Temperature: 140°F
• Notable Certifications: ASSE 1003, IAPMO Listed, CSA Certified
• Connection Type: Double Union FNPT

Other Related Variants:

• 34-NR3XLDUPEX: 3/4 Inches model size

Materials:

• Main valve body: Low Lead Cast Bronze ASTM B 584
• Bell housing: UV resistant polymer composite
• Internals: 300 Series Stainless Steel
• Stem: Low Lead Brass
• Elastomers: EPDM (FDA approved)
• Elastomers: Buna Nitrile (FDA approved)
• Cartridge: Delrin™
• Springs: 302 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 NR3XL 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; IAPMO Listed; CSA Certified; NSF/ANSI/CAN 61 (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)

Features & Benefits:

• Integral By-Pass Check Valve: Prevents buildup of excessive system pressure caused by thermal expansion.
• Balance Piston Design: Provides smooth and responsive reaction to changes in system flow demand while protecting from inlet pressure changes.
• Integral Strainer: Most suitable for residential and commercial water systems requiring frequent cleaning of sediment and debris.
• Corrosion Resistant Construction: Sealed cage washer and stainless steel adjustment components suitable for all applications including below-ground pit installation.

FAQ

Q: Can the Zurn 1-NR3XLDUPEX be installed in any orientation?

A: Yes, the Model NR3XL may be installed in any position. However, sufficient side clearance must be provided for testing and maintenance.

Q: What is the reduced pressure range for this valve?

A: The reduced pressure range for the 1 Inches model is 15 to 75 psi, with a factory preset of 50 psi.

Q: When should multiple installations be recommended?

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

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