A shower handle water supply diverter system includes a water supply in fluid communication with a hose. A handle sprayer is in fluid communication with and extends from the hose. A water diverter is provided within the handle sprayer and is in fluid communication with the showerhead. The water diverter can be operated in three modes: handle sprayer only water expulsion, shower head only water expulsion, and simultaneous handle sprayer and shower head water expulsion. By placement of the first hose and second hose in proximity to provide thermal contact therebetween, stagnant water in one hose at ambient temperature exchanges heat with water flow at a particular temperature in a second hose to change stagnant water temperature towards the temperature of the water flow.