Watts 40L125210 Temperature and Pressure Relief Valve

Description:

The Watts 40L125210 Temperature and Pressure Relief Valve is a 3/4 inch automatic reseating safety relief valve designed to protect water heaters, hot water storage tanks, and commercial hot water systems from excessive pressure and temperature conditions. Commonly installed in commercial water heaters, storage tanks, boiler support systems, institutional facilities, apartment buildings, hotels, hospitals, and industrial hot water distribution equipment requiring reliable safety protection. Maintenance personnel, plumbing contractors, OEMs, and facility operators use this valve for safety compliance, replacement projects, preventive maintenance, and new hot water system installations.

Applications:

The Watts 40L125210 Relief Valve is widely used in commercial water heating systems, domestic hot water storage tanks, apartment complexes, hotels, hospitals, schools, universities, nursing homes, restaurants, laundries, manufacturing facilities, food processing plants, institutional buildings, mechanical rooms, and industrial hot water distribution networks. The valve automatically relieves excessive pressure and temperature conditions before they can damage equipment or create hazardous operating situations. It is commonly specified in potable water heating applications where dependable temperature and pressure protection is required to safeguard water heaters, storage tanks, heat exchangers, piping systems, and related infrastructure while maintaining compliance with plumbing and safety regulations.

Technical Specifications:

• Brand: Watts
• Model: 40L125210
• Product Type: Temperature & Pressure Relief Valve
• Series: 40L
• Valve Size: 3/4 in.
• Inlet Connection: 3/4 in. Male NPT
• Outlet Connection: 3/4 in. Female NPT
• Pressure Relief Setting: 125 PSI
• Temperature Relief Setting: 210°F (99°C)
• Valve Type: Automatic Reseating Temperature & Pressure Relief Valve
• Body Material: Bronze
• Thermostat Material: Copper
• Spring Material: Stainless Steel
• Service Media: Potable Water
• Test Lever: Included
• Protection Type: Temperature and Pressure Relief
• Application: Water Heaters and Hot Water Storage Tanks
• Installation: Direct Tank Tapping Mounting
• Function: Overpressure and Overtemperature Protection
• Compliance: ASME Rated Safety Relief Service

Common Replacements:

• Watts 40XL-5 125/210 FS 3/4" Relief Valve
• Watts LF40XL-5 125/210 FS 3/4" Relief Valve
• Cash Acme NCLX 125 PSI 3/4" Temperature & Pressure Relief Valve