Watts 0009589 Set Valve

The Watts 0009589 (Model LFN55BM1-U) is a heavy-duty, lead-free water pressure reducing valve engineered for commercial and residential applications requiring precise down-stream regulation. Featuring a 3/4 inch union NPT inlet, this valve is factory-calibrated to a 50 PSI set pressure but maintains an adjustable range of 25 to 75 PSI to meet specific site requirements. This unit serves as the direct replacement for Watts 0009949, 0007712, 0045624, and N55BU-M1-3/4, ensuring a drop-in fit for legacy potable water systems. The bypass feature is integrated to handle thermal expansion pressure spikes, protecting downstream fixtures from premature fatigue. Built with a lead-free brass body and a stainless steel strainer, the LFN55BM1-U resists scale buildup and corrosion in harsh water conditions. For technicians, the serviceable integral stainless steel strainer and reinforced EPDM diaphragm simplify field maintenance while maintaining consistent pressure regulation under varying supply velocities.

• Universal Compatibility: Validated replacement for N55BU-M1-3/4, LFX65BU-3/4, and 0008248, facilitating fast retrofits.
• High-Flow Capacity: Designed to minimize pressure drop while providing stable 50 PSI delivery across high-demand plumbing branches.
• Lead-Free Construction: Meets all NSF/ANSI 372 and 61 requirements for potable water safety and plumbing code compliance.
• Thermal Expansion Control: Built-in bypass relief prevents excessive pressure buildup caused by water heaters in closed systems.
• Field Serviceable: Features a modular design allowing for rapid cleaning of the stainless steel strainer without removing the valve body from the line.

What is the difference between Watts LFN55BM1-U and the older N55B series?
The LFN55BM1-U is the modernized, lead-free version of the legacy N55B series. It maintains the same 3/4" union dimensions for direct interchangeability while utilizing materials that comply with current lead-free water regulations.

Can the set pressure be adjusted on the 0009589 valve?
Yes, while factory-set at 50 PSI, the set valve can be field-adjusted using the top adjustment bolt to a range between 25 and 75 PSI to accommodate specific HVACR and plumbing system needs.

Does this valve include the union nut and tailpiece?
The 0009589 model includes the union connection on the inlet side, which simplifies water pressure regulator installation and allows for easier removal during system flushing or maintenance.

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.