Therm Products 4kW spa heater assembly part# C2400-0165, used in many Cal Spas. Stainless steel flow thru heater tube measures 2" x 16-1/4" long, includes an element rated at 4kW @ 240 volts & 1.375kW @ 120 volts. Also included is a pressure switch tap, external thermo-well and (2) 2" split nuts.
PVC tail pieces and o-ring gaskets
are sold seperately. Heater will replace Therm Products part# C2400-0065 & C2450-0165 in addition to many others.