Watts 0066100 100XL Temperature and Pressure Relief Valve

Description:

The Watts 0066100 100XL Temperature and Pressure Relief Valve is a 3/4 inch self-closing safety relief valve designed to provide automatic protection against excessive pressure and temperature conditions in water heaters and hot water storage tanks. Commonly installed in residential and commercial water heaters, hot water supply tanks, domestic hot water systems, boiler support equipment, and institutional plumbing systems requiring reliable 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 100XL 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, institutional buildings, mechanical rooms, and domestic hot water distribution systems. The valve automatically relieves excessive pressure and temperature conditions before they can damage equipment or create hazardous operating situations. It is commonly specified for water heaters and hot water storage tanks up to 105,000 BTU/hr where dependable temperature and pressure protection is required to safeguard water heaters, storage vessels, heat exchangers, piping systems, and related infrastructure while maintaining compliance with plumbing and safety regulations.

Technical Specifications:

• Manufacturer Part Number (MPN): 0066100
• Brand: Watts
• Series: 100XL
• Product Type: Temperature & Pressure Relief Valve
• Valve Size: 3/4 in.
• Connection Type: Male NPT Inlet x Female NPT Outlet
• Pressure Relief Setting: 150 PSI
• Temperature Relief Setting: 210°F (99°C)
• Valve Type: Self-Closing Temperature & Pressure Relief Valve
• Body Material: Brass / Bronze
• Spring Material: Stainless Steel
• Test Lever: Included
• Service Media: Water
• Maximum Water Heater Capacity: 105,000 BTU/hr
• Function: Automatic Overpressure and Overtemperature Protection
• Certification: ASME Rated
• Certification: CSA Listed
• Standard: ANSI Z21.22 Certified
• Application: Water Heaters and Hot Water Storage Tanks
• Feature: Thermo-Bonded Thermostat Coating
• Feature: Automatic Reseating Design

Common Replacements:

• Watts 100XL-4 3/4" Temperature & Pressure Relief Valve
• Watts LF100XL 3/4" Temperature & Pressure Relief Valve
• Cash Acme NCLX-5LX 3/4" Temperature & Pressure Relief Valve