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How To: Install a SharkBite Thermal Expansion Relief Valve

Need to replace a thermal expansion tank? SharkBite’s thermal expansion relief valve (TERV) takes the place of an expansion tank while saving space and reducing fail points. This means no more busted bladders, pinhole leaks or condensation issues leading to an inevitable expansion tank replacement. The thermal expansion relief valve functions similarly to an expansion tank by absorbing the excess pressure in the plumbing system caused by thermal expansion.  

Instead of storing water like an expansion tank, the Thermal Expansion Relief Valve releases it, solving common pain points pros see when replacing expansion tanks. 

The TERV meets both international and uniform plumbing code requirements for thermal expansion control and features push-to-connect ends to make your job more efficient. It is compatible with PEX, copper and CPVC pipe.  

How to Install a SharkBite Thermal Expansion Relief Valve 

  1. Shut off the water supply.  
  2. Cut a section of pipe cleanly and squarely from the cold-water inlet. If using copper, use your deburr and gauge tool to deburr the pipe before connecting to avoid o-ring seal damage and maintain warranty. 
  3. Still using your deburr and gauge tool, mark the proper insertion depth on your pipe.  
  4. Push the valve onto the pipe to the mark you just made. Repeat the same process for the other side of the valve.  
  5. Connect a 1/2 in. drain line to the bottom outlet of the valve, and discharge at an approved location.  
  6. Remove your existing expansion tank if your system has one and turn your water back on to test your system.  

Read More: Thermal Expansion Relief Valves Replace Expansion Tanks