Watts 3/4inch 3L 150PSI Pressure Relief Valve 0011917

Original price was: $77.98.Current price is: $60.79.

10 in stock

SKU: 40160 Categories: ,


The Watts 3/4″ 3L 150 PSI Pressure Relief Valve 0011917 is a vital safety feature for protecting domestic storage tanks and tankless water heaters from excessive pressure build-up. Here’s a breakdown of its key features and functions:


  • Relieves excess pressure in water tanks and heaters: If water pressure exceeds the set limit of 150 PSI, the valve automatically opens and releases water, preventing potential tank ruptures or explosions.
  • Protects against thermal expansion: As water heats up, it expands, potentially exceeding safe pressure limits. The valve releases excess pressure and maintains a safe operating range.
  • Complies with safety standards: Meets ANSI Z21.22, ASME, and CSA standards, ensuring reliability and performance.

Key Features:

  • 3/4-inch inlet and outlet connections: Fits standard plumbing connections for most residential water heaters and tanks.
  • Bronze construction: Durable and corrosion-resistant for long-lasting performance.
  • Poppet-type valve: Provides reliable and quick pressure relief action.
  • Test lever: Allows manual testing of the valve to ensure proper functionality.
  • Pressure range: 75-150 PSI: Adjustable within this range to adapt to specific system requirements.
  • Compact design: Easy to install in tight spaces around water heaters and tanks.


  • Domestic hot water storage tanks
  • Tankless water heaters
  • Residential hydronic heating systems
  • Boiler systems

Things to Consider:

  • System compatibility: Ensure the valve’s size, pressure rating, and material match your specific system requirements.
  • Professional installation recommended: While DIY installation is possible, consulting a qualified plumber is recommended for optimal performance and safety, especially when dealing with water connections and pressure relief systems.
  • Regular maintenance: Periodically test the valve using the lever to ensure its functionality and prevent build-up or rust.


  • Watts offers similar pressure relief valves in different sizes and pressure ratings to suit varying system needs.

Overall, the Watts 3/4″ 3L 150 PSI Pressure Relief Valve 0011917 is a reliable and affordable choice for protecting your water heater and tank from dangerous pressure build-up. Its durable construction, adjustable pressure range, and easy installation make it a popular option for both homeowners and professionals.

Additional information

Weight 0.68 lbs


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