Watts 015673 40XL-5 Temperature and Pressure Relief Valve

Description:

The Watts 015673 40XL-5 Self-Closing Temperature and Pressure Relief Valve is a 3/4 inch safety relief valve designed to protect residential and commercial water heaters, hot water storage tanks, and related systems from excessive temperature and pressure conditions. Commonly installed in domestic water heaters, storage tanks, boiler support systems, commercial hot water equipment, and institutional plumbing systems requiring automatic overpressure and overtemperature protection. Maintenance personnel, plumbing contractors, OEMs, and facility operators use this valve for safety compliance, replacement projects, preventive maintenance, and new water heating system installations.

Applications:

The Watts 40XL-5 Temperature and Pressure Relief Valve is widely used in residential water heaters, commercial hot water storage tanks, apartment complexes, hotels, hospitals, schools, restaurants, nursing homes, industrial wash systems, mechanical rooms, and institutional plumbing systems. The valve automatically relieves excess pressure and temperature conditions that could damage water heating equipment or create hazardous operating conditions. It is commonly specified in domestic hot water systems, indirect water heating installations, process water heating applications, and commercial plumbing systems where reliable safety protection is required to safeguard equipment, personnel, and facility infrastructure while maintaining compliance with plumbing and safety codes.

Technical Specifications:

• Manufacturer Part Number (MPN): 015673
• Brand: Watts
• Product Type: Temperature & Pressure Relief Valve
• Series: 40XL-5
• Valve Size: 3/4 in.
• Connection Type: Female NPT
• Pressure Relief Setting: 150 PSI
• Temperature Relief Setting: 210°F (99°C)
• Valve Type: Self-Closing Temperature and Pressure Relief Valve
• Body Material: Bronze
• Thermostat Material: Stainless Steel
• Service Media: Potable Water
• Application: Water Heaters and Hot Water Storage Tanks
• Function: Overpressure and Overtemperature Protection
• Installation: Vertical Orientation Recommended
• Operation: Automatic Reseating Design
• Test Lever: Included
• Compliance: ASME Rated Temperature and Pressure Relief Service

Common Replacements:

• Watts LF40XL-5 3/4" Temperature & Pressure Relief Valve
• Cash Acme NCLX-5LX 3/4" T&P Relief Valve
• Zurn Wilkins TP1100A 3/4" Temperature & Pressure Relief Valve