![HEA14100451 Cal Spa Heater, Flo Thru, 5.5KW HEA14100451 Cal Spa Heater, Flo Thru, 5.5KW](https://cdn11.bigcommerce.com/s-laumwfui97/images/stencil/300x300/products/27073/33828/HEA14100450__87279.1511163153.jpg?c=2)
Cal Spa XL Exchanger Replacement This heater assembly is not an exchanger but an in-line flow thru replacement. This heater assembly is designed as a drop-in replacement. 2" x 15"s/s housing with 2" slip tailpieces, dual thermowell grooves w/cover, 1/8"npt pressure switch tap, and metal box. Switch not included.