Balboa 15" 3.0kW M7 Flo-Thru Heater (26-58118-K)

Balboa 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. Proper operation depends on the heater, sensors, water flow, and control system working together, so replacement selection should be based on the original part number and full configuration rather than wattage alone.

The 3.0kW output provides a specific balance between heating capacity and electrical demand for systems designed around this rating. Replacing it with a heater of a different wattage can affect recovery characteristics and electrical loading, so the original specification should be maintained unless the spa manufacturer explicitly approves another configuration.

Proper fitment begins with verification. Compare the existing heater’s part number, length, rated output, sensor or control connections, plumbing orientation, and electrical requirements before ordering. Spa heaters are not universally interchangeable, and taking a few minutes to confirm these details can reduce installation delays, unnecessary returns, and repeat service calls.

Once correctly matched and installed, the Balboa 26-58118-K can help restore dependable water heating, steadier temperature maintenance, and the day-to-day comfort expected from a properly operating spa.

• M7-style flow-through heater configuration
• 3.0kW rated heating output
• 15" heater configuration for correct physical fitment
• Sensor-based M7 configuration should be matched to the original system
• Supports dependable temperature recovery when correctly matched and installed