Continuing our deep dive into the Rheem Canada Proterra heat pump water heater... Brian explains how the wicking material senses any water leaks and closes the incoming water valve. If taps stay closed, we will maintain a vacuum seal in the tank. #heatpump #waterheater #hotwatertank #hvac #plumbing #plumber #hvactech #hvactraining #HVACKnowledge #hvaceducation #heatpumpwaterheater #RheemProTerra #RheemHeatPump. | HVAC Know It All