Zurn Wilkins 1-625XL 1" 25AUB Replacement Pressure Reducing Valve

Zurn Wilkins 1-625XL 1" Pressure Reducing Valve with Integral By-Pass.

Product Overview

The Zurn Wilkins 1-625XL 1" Pressure Reducing Valve is a premium solution for maintaining safe and consistent water pressure in residential and commercial systems. Designed as a direct dimensional replacement for the Watts 25AUB, this valve offers the performance of the 600XL series with an enhanced footprint for fast, cost-effective installation. With an integral by-pass check valve, built-in strainer, and a balanced piston design, the 625XL ensures long-lasting reliability, simplified maintenance, and protection against excessive system pressure caused by thermal expansion.

Ideal for use in potable water lines, the 625XL helps extend the life of your plumbing system, reduce water hammer, and maintain consistent flow across varying demand levels—all while meeting rigorous backflow prevention and water safety standards.

Features & Benefits

• Direct Replacement Compatibility – Fits as a drop-in replacement for Watts 25AUB-Z3, eliminating the need for costly re-piping.

• Superior Maintenance Access – Bronze threaded bell design reduces service time by up to 50% compared to bolted styles.

• Integrated By-Pass & Strainer – Protects against pressure buildup from thermal expansion and debris, ensuring smooth operation.

• Durable Construction – Lead-free bronze body meets NSF/ANSI 61 standards for potable water safety.

• Optimized Performance – Balanced piston technology provides stable, responsive pressure regulation.

Specifications

• Size: 1" (25mm)

• Body Material: Lead-free bronze

• Maximum Working Pressure: 300 PSI

• Hydrostatic Test Pressure: 300 PSI

• Maximum Temperature: 140°F (60°C)

• Reduced Pressure Range: 25 – 75 PSI

• Factory Preset: 50 PSI

• Compliance: ASSE® 1003, IAPMO®, CSA®, City of Los Angeles Approved, NSF/ANSI 61

Installation Tips

• Can be installed in any orientation; follow local codes and plumbing standards.

• For installations in pits, vaults, or indoor spaces, specify the sealed cage (SC) option.

• Use multiple units where demand variations are wide or when reducing pressure ratios greater than 4:1.

• Always verify outlet pressure with a downstream gauge after adjustment.

• Do not bottom out the adjustment bolt—ensure proper calibration during setup.

FAQs

Q: What makes the 625XL different from other pressure reducing valves?
A: The 625XL combines a compact replacement footprint with threaded bronze access for easier maintenance, plus an integral by-pass and strainer for added protection.

Q: Is this valve compliant with lead-free regulations?
A: Yes, the 625XL is certified to NSF/ANSI 61 and meets all current lead-free requirements.

Q: Can this valve handle commercial applications?
A: Absolutely. The robust bronze construction and 300 PSI rating make it suitable for both residential and light commercial use.

Q: Do I need additional parts to replace a Watts 25AUB?
A: No, the Zurn Wilkins 625XL is a direct replacement, ensuring a seamless swap without extra fittings or re-piping.