Vulcan Spa/Hot Tub Heater, Thermostat, 20 in, 240V - HTTR060U Price For: Each Phase: 1 Item: Spa and Hot Tub Heater Fits Heaters: - Voltage: 240 Amps: 25.00 Control Thermostat: Included Inlet Size/Bushing Size: 1-1/4" NPT kW: 6 Heater Type: Immersion Length: 20" For Use With: - Min. Flow Rate: 15 gpm Country of Origin (subject to change): United States