Watts 40L Automatic Temperature And Pressure Relief Valve

Description:

The Watts 40L Safety Relief Valve is a 3/4 inch automatic reseating temperature and pressure relief valve designed to protect hot water heaters, storage tanks, and commercial hot water systems from excessive temperature and pressure conditions. Commonly installed in commercial water heaters, hot water supply tanks, boiler support systems, institutional facilities, and industrial hot water distribution equipment requiring dependable 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 40L Safety Relief Valve is widely used in commercial water heating systems, hot water storage tanks, apartment complexes, hotels, hospitals, schools, universities, nursing homes, restaurants, laundries, manufacturing facilities, food processing plants, mechanical rooms, institutional buildings, 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 reliable 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
• Product Type: Temperature & Pressure Safety Relief Valve
• Series: 40L
• Valve Size: 3/4 in.
• Inlet Connection: 3/4 in. Male NPT
• Outlet Connection: 3/4 in. Female NPT
• Body Material: Bronze
• Valve Type: Automatic Reseating
• Protection Type: Temperature and Pressure Relief
• Temperature Relief Setting: 210°F (99°C)
• Maximum Working Pressure: 150 PSI
• Thermostat Type: Thermo-Bonded Coated Thermostat
• Thermostat Probe Length: 3 in. or 5 in. depending on model configuration
• Thermostat Material: Copper
• Test Lever: Included
• Feature: Tamper Resistant Bonnet Screws
• Feature: Non-Mechanical Seat-to-Disc Alignment
• Service Media: Potable Water
• Application: Water Heaters and Hot Water Storage Tanks
• Installation: Direct Tank Tapping Mounting
• Compliance: Commercial Temperature and Pressure Relief Service

Common Replacements:

• Watts 40XL-5 125/210 FS 3/4
• Watts LF40XL-5 100/210 FS 3/4
• Cash Acme NCLX 3/4" Temperature & Pressure Relief Valve