Therm 4.0kW [15" x 2"] Flo-Thru Incoloy Heater [Caldera Spas] (26-3330-5S-K) tees Filter cartridge for compatible spa

Filter cartridge for compatible spa and pool applications using the 71311 reference

This replacement is especially useful when the original flapper is worn

Improves directional flow control and service confidence

It is a practical service option when dependable heater replacement is needed in a compatible Hercules-based spa setup

Therm 4.0kW [15" x 2"] Flo-Thru Incoloy Heater [Caldera Spas] (26-3330-5S-K) tees Filter cartridge for compatible spaTherm [Caldera Spas] 15" 4. 0kW Flo Thru Incoloy Heater (26 3330 5S K) is designed as a purpose focused replacement heater for Caldera Spas, where matching physical configuration and heating output is essential to dependable spa operation. Its 4. 0kW heating output and 15" heater length should be matched to the original equipment requirements before installation, since spa heaters are not universally interchangeable. In day to day spa operation, a