Watts 6550050 Lead Free Tempering Valve 45 Gpm with Checkstops

Product Description

The WATTS 6550050 is a lead-free tempering valve designed for hot water temperature control in commercial and residential plumbing systems. Sold under the Powers HydroGuard LFMM432-1 product line, this valve blends hot and cold water supplies to deliver a consistent, safe outlet temperature within a range of 90 to 160 degrees F. It handles flow rates up to 45 GPM and connects via 3/4-inch x 1-inch female pipe thread (FPT) ports. Integral checkstops are included, eliminating the need for separate isolation valves at the inlet connections. Licensed plumbers and mechanical contractors install this valve in potable water systems where scald protection and thermal delivery consistency are required.

This tempering valve is suited for commercial and residential applications including central water heating systems, institutional facilities, and multi-fixture hot water distribution. It is appropriate wherever a point-of-distribution mixing solution is needed to maintain safe delivery temperatures across a broad flow range. The included checkstops allow for in-line service and balancing without full system shutdown, making it a practical choice for retrofit and new construction installs alike. Refer to the project specifications and local plumbing code for required temperature setpoint and installation orientation requirements.

Key Features

• Lead-free construction meets Safe Drinking Water Act requirements for potable water use
• 45 GPM maximum flow rate supports high-demand commercial installations
• Temperature range of 90 to 160 degrees F provides broad adjustment capability
• 3/4-inch x 1-inch FPT connections for direct inline installation
• Integral checkstops included for isolation and service without additional shutoff valves

Compatibility

Designed as an OEM-style replacement and direct-install tempering valve for commercial and residential potable hot water distribution systems requiring lead-free compliance and high-flow mixing capability.

Installation Notes

Installation must be performed by a licensed plumber in accordance with local plumbing codes and applicable IPC or IAPMO standards. Shut off the hot and cold water supply and relieve system pressure before beginning installation. Use the integral checkstops to isolate the valve during service or calibration without draining the full system. Do not exceed the rated flow or temperature range listed on the valve body.

Technical Specifications

• Manufacturer Part Number (Powers): LFMM432-1
• Flow Rate: 45 GPM maximum
• Temperature Range: 90 to 160 degrees F
• Inlet x Outlet Connection: 3/4 inch x 1 inch FPT
• Size: 3/4 inches
• Lead Free: Yes
• Checkstops: Included

Standard Information

• Brand: WATTS
• Manufacturer Part Number: 6550050