Watts 125210 Temperature and Pressure Relief Valve

Description:

The Watts 40L 125210 Relief Valve (Part No. 125210) is a 3/4-inch bronze automatic reseating temperature and pressure relief valve designed to provide protection against excessive temperature and pressure in commercial hot water supply tanks and water heaters. The valve is installed directly into tank tappings and automatically opens when pressure or temperature exceeds safe operating limits, helping prevent equipment damage and hazardous conditions. It features a bronze body, NPT male inlet and female outlet connections, thermo-bonded thermostat, tamper-resistant bonnet screws, test lever, and automatic reseating design for reliable long-term operation. The valve is factory set to relieve at 125 PSI and 210°F.

Applications:

The Watts 40L 125210 Relief Valve is commonly used in commercial water heaters, hot water storage tanks, boiler systems, water heating equipment, institutional facilities, hotels, hospitals, schools, manufacturing plants, and industrial hot water systems where automatic temperature and pressure protection is required to safeguard equipment, piping, and personnel from overpressure and overheating conditions.

Technical Specifications:

• Manufacturer: Watts Water Technologies
• Series: 40L
• Part Number: 125210 / 0153109
• Product Type: Temperature and Pressure Relief Valve
• Connection Size: 3/4 Inch
• Inlet Connection: Male NPT
• Outlet Connection: Female NPT
• Body Material: Bronze
• Pressure Relief Setting: 125 PSI
• Temperature Relief Setting: 210°F (99°C)
• Maximum Working Pressure: 150 PSI
• Thermostat Probe Length: 3 Inch
• Thermostat Material: Copper
• Operation: Automatic Reseating
• Test Lever: Yes
• Protection Type: Temperature and Pressure Relief
• Installation: Direct Tank Mounting
• Application Type: Hot Water Heaters and Storage Tanks
• Equipment Category: Safety Relief Valve

Common Replacements:

• Watts LF40L-125210 3/4 Relief Valve
• Cash Acme Temperature and Pressure Relief Valve
• Apollo 10-400 Series T&P Relief Valve