• Dutco Tennant LLC, PO Box 233, Dubai, U.A.E.

A temperature-pressure relief valve is a valve which is located somewhere near the top of our water heater. The valve has a lever which can be lifted up or down and a discharge pipe which runs from the valve straight down to the bottom of the water heater. The main purpose of the temperature-pressure relief valve is to release water, and in turn lower the pressure inside the tank, in the event that the temperature or pressure gets too high in the water heater. Without a temperature-pressure relief valve, the water heater would run the risk of exploding if the temperature or pressure got higher than the tank was designed to handle.

Temperature and pressure relief valves are used in residential and commercial water heater and hot water storage tank applications to provide automatic temperature and pressure protection to hot water supply tanks and hot water heaters. We have a full-line of products in multiple sizes, pressure ratings and inlet/outlet types.

Temperature and pressure relief valves protect equipment from excess pressure and catastrophic failure. They work as the last line of defense. These valves are used in residential water heaters and are conventionally designed to relieve pressure at 150 psi and temperature at 210 degrees F. ASME, ANSI and CSA (AGA) approved relief valves protect the water heater from excess pressures and temperatures by discharging water.

When water is heated, it expands. In a 40-gallon water heater, water being heated to its thermostat setting will end up expanding by approximately ½ gallon. The extra volume created by this expansion needs somewhere to go or pressure will dramatically increase, such as when water is heated in a closed system. A good indication of thermal expansion is when the T&P valve releases about one cup of water for every 10 gallons of heater capacity with each heating cycle. Dutco Tennant LLC is a well-recognized name when it comes to suppliers for various kinds of industrial and engineering solutions in the Middle East and GCC region. For the last four decades, we have been working with various private and public sector companies and have contributed to the infrastructural development of various cities.


  • A.S.M.E. Rated**, CSA Listed
  • Features a unique thermostat with a special thermo-bonded coating
  • Lead-Free copper silicon alloy body
  • Stainless steel spring
  • The thermostat is accurate and proven. Exclusively designed and manufactured by Watts

Technical Data

  • Temperature Relief: 210°F (99°C)
  • Pressure Relief Range : 75 to 150psi (5.2 to 10.3 bar)
  • Standard Pressure Settings : 75, 100, 125, or 150psi (5.27, 7.03, 8.79, or 10.55 bar)