Watts 3L Pressure Relief Valve

Watts 3L Pressure Relief Valve helps safeguard domestic storage tanks by automatically releasing excess pressure when needed. This poppet, lever-operated valve is built with a brass body, stainless steel spring, and a silicone disc to provide reliable relief in challenging conditions.

With 3/4 inch inlet and 3/4 inch outlet connections and end connections male thread x female thread, it handles up to a 150 PSI set pressure and up to 210°F in hot environments. This valve is rated for 75 to 150 PSI operating pressure and supports up to 200,000 BTU/hour of capacity, making it suitable for domestic storage tanks, tankless water heaters, and solar heating systems.

Designed to meet industry standards, it complies with ASME HV, CSA, and ANSI Z21-22/CSA 4.4 for reliable safety nationwide. The unit’s compact footprint and overall dimension of 1-5/32 inch width by 3-11/64 inch height ensure easy installation in crowded spaces. The included test lever lets technicians relieve and verify operation, ensuring storage safety during maintenance.

• Brass body with stainless steel spring and silicone disc
• 3/4" inlet/outlet; male x female threaded ends
• Set pressure 150 PSI; operating range 75–150 PSI
• Temperature rating 210°F
• Includes test lever for relief verification
• Applications: domestic storage tanks, tankless water heaters, solar heating
• ASME HV, CSA, ANSI Z21-22/CSA 4.4 compliant
• 200,000 BTU/hour capacity
• Compact: 1-5/32" W x 3-11/64" H