Description
This listing offers a complete 4.0KW heater assembly featuring tube, heating element, metal enclosure, and connection wiring. Engineered specifically for Cal Spa hot tub systems, this assembly serves as an ideal retrofit solution for the XL Heat Exchanger design. The key advantage of this replacement is its serviceable heating element - unlike the XL Heat Exchanger which requires full unit replacement upon failure, this heater allows element-only replacement, saving time and money. Design includes integrated high limit retention tab and pressure switch port for complete functionality.
Aftermarket Drop-In Solution for Cal Spa XL Exchanger Models
This flow-through heater configuration replaces exchanger-style units with modern in-line design. Engineered for seamless installation with 2 inch x 15 inch stainless steel housing, 2 inch slip tailpiece connections, dual thermowell channels with protective cover, 1/8 inch NPT pressure switch tap, and metal junction box. Pressure switch sold separately.
Important Product Update: Current production units from the new manufacturer feature updated construction where the heating element operates internally within the water flow. This modern design eliminates the need for external insulation wrap and mechanical high limit switch that older external-element models required. The internal element configuration provides improved safety and serviceability - future element replacement is simple and economical without replacing the entire housing assembly.
