The Wilkins 38-ZW3870XLT-4P is a point-of-use thermostatic mixing valve designed for scald prevention at individual fixtures with 4-port configuration for multi-outlet applications.

Key Specifications:

• Size: 3/8 Inches
• Maximum Working Pressure: 145 psi
• Outlet Temperature Range: 95-115°F (35-46°C)
• Notable Certifications: ASSE 1070, cUPC, CSA B125.70
• Flow Rate: 0.06–3.1 GPM

Other Related Variants:

• 38-ZW3870XLT: 3-port standard version (1 Hot in, 1 Cold in, 1 Mixed out)

Materials:

• Low Lead Cast Bronze ASTM B 584 w/Chrome Plating ASTM B 456 Service Condition #2
• Low Lead Brass ASTM B 927 UNS C27450
• Polysufone Piston
• Noryl GFN2 Guide Tube
• 300 Series Stainless Steel Spring
• Viton Seals
• Acetal Co-Polymer Checks

Typical Installation:

The device is designed to be installed at a single outlet. It may be used to supply individual outlets when there is sufficient supply pressure. It is suggested to use ball valves on the hot and cold inlet supplies. Ideal for installation under sinks and sensor faucets.

Standards Compliance:

ASSE Listed 1070; cUPC Listed; CSA Certified B125.70; NSF/ANSI/CAN 61-9 Q≤1 (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)

Features & Benefits:

• Scald Protection: Rapid response and precise temperature control with outlet range 95-115°F meets ASSE 1070 requirements for fixtures, sinks, lavatories or bathtubs.
• 4-Port Configuration: The Zurn 38-ZW3870XLT-4P provides both mixed and cold outlets, ideal for multi-outlet applications or individual fixture protection with flexible supply options.
• Ultra Low Flow Compatibility: With minimum flow rating of 0.06 GPM, the Wilkins 38-ZW3870XLT-4P provides proper scald protection when used with ultra low flow faucet aerators.
• Integrated Safety Features: Includes integral check valves and strainer screens on hot and cold supply lines for enhanced reliability and water quality protection.

FAQ

Q: What is the maximum pressure differential allowed between hot and cold inlets?

A: The maximum pressure differential is 15 psi between hot and cold inlets for proper operation.

Q: What is the difference between the 38-ZW3870XLT and 38-ZW3870XLT-4P models?

A: The 38-ZW3870XLT is a 3-port version with one mixed outlet, while the 38-ZW3870XLT-4P is a 4-port version with both mixed and cold outlets for multi-outlet applications.

Q: Does the temperature need to be adjusted after installation?

A: Yes, the temperature must be field set during installation. The valve offers set temperature accuracy of +/- 3°F for precise control.

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