Last Friday at 2:45 pm PST I contacted Rheem tech support to order a replacement part for our water heater's control valve (combination Gas Control Replacement Kit (NG)), part number SP 20867D ...

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 ...