Balboa 4.0 kW [15" x 2"] Spa Heater w/Sensor [1.25 PSI] [Pressure Switch] [Jacuzzi R574/R578] (53349) (G7418) drains Smaller center cores help support

Smaller center cores help support cartridge alignment and internal stability in lower-capacity filter models

Mid-range horsepower motors balance performance and efficiency

Application-specific design for dependable performance

and reduced hydraulic performance

and homeowners investing in a better end result

Balboa 4.0 kW [15" x 2"] Spa Heater w/Sensor [1.25 PSI] [Pressure Switch] [Jacuzzi R574/R578] (53349) (G7418) drains Smaller center cores help supportBalboa 15" 4. 0 kW Spa Heater W Sensor [1. 25 PSI] [Pres Swtch] Jacuzzi R574 R578 (53349) (G7418) is engineered with a clear focus on Jacuzzi specific compatibility, making it a targeted solution rather than a generic replacement component. In spa systems, heaters are not interchangeable without consequencematching output, flow characteristics, and system communication is essential to achieving consistent performance. This model is built to align with