Watts 0066090 100XL-3-125 3/4″ T&P Relief Valve 210°F 100,000 BTU

Description

Watts 100XL-3-125 Temperature & Pressure Relief Valve

The Watts 0066090 100XL-3-125 is a 3/4-inch temperature and pressure (T&P) relief valve engineered to provide critical safety protection for residential and light commercial water heaters and storage tanks. Designed to automatically discharge when system temperature or pressure exceeds safe operating limits, this valve helps prevent catastrophic equipment failure and ensures compliance with plumbing and mechanical safety codes.

Key Specifications

• SKU: 0066090
• Model: 100XL-3-125
• Connection Size: 3/4 inch
• Pressure Setting: 125 PSI
• Temperature Setting: 210°F
• BTU/hr Rating: 100,000 BTU/hr
• Brand: Watts

Features & Benefits

• Automatic relief activation at 210°F or 125 PSI — whichever threshold is reached first
• 100,000 BTU/hr discharge capacity suitable for standard residential water heaters
• 3/4-inch connection for straightforward installation on standard tank ports
• Durable construction built to Watts’ exacting quality standards for long-term reliability
• Helps meet local plumbing code and ASME/ANSI safety requirements for water heater installations
• Designed for easy field replacement on existing water heater systems

Applications

• Residential and light commercial water heaters
• Hot water storage tanks
• Hydronic heating systems requiring T&P overpressure protection

Why Choose Watts?

Watts is a globally recognized leader in flow control products, delivering industry-trusted safety valves that protect people, property, and equipment. The 100XL series is a proven solution for water heater safety, combining reliable performance with straightforward installation to give contractors and homeowners peace of mind.