Thermal Relief Valve

• For a pump that installed with a internal bypass unloader,when in bypass mode the recirculating water in the pump head will heat up very quickly and harm the valve and seals.The thermal protection valve protects the pump from overheating.
  
• It features a wax plug,which getting soft and open the valve to relieve the hot water temperature above 60℃/140℉,after the system cooling down the wax plug will reset.