q*1-1/4 N45BDU-S-M1 DU SWT PRV

Product Description

This part is a 1-1/4 inch pressure reducing valve from the Watts N45B / LFN45B series. It is designed to protect plumbing systems by lowering high inlet water pressure to a stable, adjustable outlet pressure.

Key Features

• Type: Pressure Reducing Valve (PRV)
• Size: 1-1/4"
• Connection: DU SWT = Double Union Sweat (solder connections)
• Model family: N45B / LFN45B series
• Adjustment range: typically 25–75 PSI
• Standard setting: ~50 PSI
• Built-in strainer: helps trap debris
• Thermal bypass: reduces pressure from thermal expansion
• Lead-free brass/copper alloy construction

What it does

• Reduces incoming high city water pressure
• Protects pipes, fixtures, water heaters, and appliances
• Helps maintain consistent water pressure throughout the building

Common uses

• Commercial buildings
• Residential main water service lines
• Mechanical rooms / utility systems

Simple explanation

It’s a heavy-duty main water regulator valve that keeps your building’s water pressure safe and steady, especially when supply pressure is too high.