Last Friday at 2:45 pm PST I contacted Rheem tech support to order a replacement part for our water heater's control valve ... You can't buy replacement parts locally. They have to be purchased ...

After thorough research, we installed the Rheem RTEX-18 Tankless Water Heater. Keep reading to find out more about this space-saving water heater and what I discovered about on-demand hot water ...

My 12-year-old Rheem tankless water heater had stopped putting out hot ... it and even though I put an order in for the replacement parts on Saturday morning 12/21 and requested expedited service ...