This 4.0kW 230V flow-through heater assembly is an OEM replacement part designed for Cal Spas hot tubs and spa systems. Operating at 230 volts with 4,000 watts of heating power, this genuine Cal Spa heater measures 2" x 15" long and delivers reliable, efficient water heating for your spa. The flow-through design ensures consistent heat distribution as water circulates through your system.
At Bubbles Supply, we guarantee this heater is the exact fit for your Cal Spa system, backed by our 1-year warranty and same-day shipping on most orders. This OEM part restores your spa's original heating performance and addresses common heating issues like insufficient heat or complete heating failure. Professional installation is recommended to ensure proper electrical connections and optimal performance—always verify your spa's voltage requirements and heater specifications before installation.