More and more people are installing plumbing systems with PEX (Cross-linked Polyethylene) and are asking, “will PEX work with Smart Recirculation Control products?”
That being said, the Smart Recirculation Control will work fine with a PEX installation. However, you will need to install a short section of copper pipe immediately after the water heater and on one side or the other of the hot water recirculation pump to provide a location to attach the temperature sensors.
PEX does a pretty good job of insulating which creates a lag in sensing the temperature causing the Smart Recirculation Control
to react slowly to the changing water temperature in the piping. Also, be sure to put pipe insulation over the temperature sensors to help with temperature sensing.