Watts 0009431 Valve

The Watts 0009431 (Series LF25AUB-Z3) is a heavy-duty, 1.5-inch water pressure reducing valve engineered for professional contractors managing high-demand residential and commercial plumbing systems. This lead-free brass water regulator features a robust copper silicon alloy body and a sealed spring cage with stainless steel screws, making it ideal for accessible outdoor pits or high-moisture installations. As a direct 0009431 replacement for legacy models like the 0070320, 0070322, and non-lead-free 25AUB versions, it ensures seamless compatibility for system upgrades.

Operating with an adjustable range of 25-75 PSI, this valve comes factory-set at 50 PSI to optimize water conservation and protect downstream fixtures from excessive pressure. The 1.5-inch union FNPT inlet and FNPT outlet configuration facilitates fast installation, while the replaceable seat module and integral stainless steel strainer allow for efficient in-line servicing without removing the valve body. Its thermal expansion bypass feature manages pressure spikes in closed systems, ensuring long-term reliability for hot water applications up to 160°F.

Key Benefits for Contractors:

• Broad Compatibility: Replaces 0070320, 0070322, and 25AUB-1 1/2 series models with 1.5" connections.
• Durable Construction: Features a lead-free copper silicon alloy body and an EPDM reinforced diaphragm for high-temperature resistance.
• Serviceability: Integral stainless steel strainer and replaceable seat module enable rapid maintenance in the field.
• Versatile Installation: Sealed Z3 spring cage supports pit or outdoor applications with corrosion-resistant hardware.
• System Protection: Integrated bypass feature handles thermal expansion, protecting water heaters and piping components.

Common Questions & Technical Support:

Is the 0009431 a direct replacement for older 25AUB-Z3 models?
Yes, the 0009431 is the current lead-free standard for 1.5" applications, superseding several legacy part numbers including 0070320 and 0070322.

How do I adjust the outlet pressure on this valve?
Loosen the lock nut on the spring cage and turn the adjusting bolt clockwise to increase pressure or counterclockwise to decrease it within the 25-75 PSI range.

Can this regulator handle high inlet pressures?
The Series LF25AUB-Z3 is rated for maximum supply pressures up to 300 PSI, making it suitable for volatile municipal water lines.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.