Abstract: Embodiments of the Water Supply Conduit Heating are comprised of a control apparatus and a delivery apparatus. The control apparatus is comprised of two electrically actuated solenoid valves, a pump, a hot water connection, a cold water connection, an electronic control, a temperature sensor, and a double-pipe source connection. The two electrically actuated solenoid valves are controlled by the electronic control. As the temperature of the fluid inbound from the source varies, the electronic control adjusts the mix of hot water and cold water from the hot water connection and the cold water connection to provide an appropriate temperature fluid to the outbound fluid to the source connection. The electronic control is used to measure the temperature of the fluid in the conduit and to direct fluid into the conduit as required to control fluid temperature.