Balboa 15" 3.0kW M7 Flo-Thru Heater (26-58118-K) jettrim A correctly matched cartridge helps

A correctly matched cartridge helps reduce strain on the pump

Improves usability and replacement accuracy

Electrical installation should follow all applicable pool/spa lighting codes and be performed by qualified personnel

Electrical work should be completed by a qualified pool professional or licensed electrician

Balboa 15" 3.0kW M7 Flo-Thru Heater (26-58118-K) jettrim A correctly matched cartridge helpsBalboa 15" 3. 0kW M7 Flo Thru Heater (26 58118 K) is a 3. 0kW replacement heater for compatible Balboa spa systems using a 15" M7 style flow through configuration. Because Balboa produced multiple heater assemblies with similar dimensions, confirming the original part number and connection arrangement is an important step before replacement. M7 style heating systems are designed around sensor based monitoring associated with the heater assembly.