Balboa BP100 15" 5.5kW Flo-Thru Heater (26-58509) underwatermagic 18V 4-prong design

18V 4-prong design

Fits multiple filter sizes

Hayward part number SPX1250Z4

Optimized search terms include hose adapter

Fits compatible AstroLite SP0580S lighting applications

Balboa BP100 15" 5.5kW Flo-Thru Heater (26-58509) underwatermagic 18V 4-prong designBalboa BP100 15" 5. 5kW Flo Thru Heater (26 58509) is a 5. 5kW replacement heater intended for compatible Balboa BP100 spa systems. Because heater output directly affects electrical demand and heating performance, confirming both the original part number and system rating is essential before installing a higher output replacement assembly. BP100 systems are compact control platforms, so the heater assembly is an integrated part of the overall