Thank you for visiting the website of KC Water Heaters, since 2013 we have been focused on water heater installation, service, and repair.
If you plan to replace your water heater the first step is to determine the need for a Pressure Regulating Valve and Thermal Expansion tank. The picture below shows both the PRV and expansion tank just to the left of the water heater. These two devices work together to help protect your entire plumbing system.
Water pressure can range anywhere from below 50 psi up to 150 psi on residential domestic lines. The maximum water pressure that should be inside your house is 80 psi. The expansion tank is calibrated to that set water pressure which is usually about 68 psi.