This parts is a Complete Heater that includes the Flow Sensor and Temperature Probe found in Gecko IN.XE and IN.YE series packs.. It fits 2" Heater Unions that measure 3" across the threads..
This part is a Heater, FloThru, Universal Fit, 15" x 2", 230v, 4.0kW.. This heater will work in place of the following heaters: 1563-08 , 20-00245 , 20-00317 , 20-00318 , 20-00319
Heater, FloThru, Watkins TR, 15" x 2", 4.0kW, 230v, Generic Note: This heater does not have a Pressure Switch port or studs for the ground bar.. Housing Configuration ...
Stainless steel aftermarket replacement heater assembly fits systems using a pressure switch. 5.5kW/240v with 1/8"npt pressure switch tap. 2" x 15" manifold includes tailpieces