Balboa 5.5kW 230V Flow Thru Heater G7518
The Balboa G7518 M7 Spa Heater is a 5.5 kW, 240V stainless steel flo-thru heater designed as a direct OEM-style replacement for a long list of earlier Balboa M7 heater models, offering powerful performance without mounting studs and with dual built-in sensors for modern controls. It uses 2" straight plumbing connections and a 15" housing, making it a go-to replacement for many 5.5 kW M7-equipped spas.
Key Specifications
- Model: G7518 Balboa M7 Spa Heater, 5.5 kW, 240V straight flo-thru design.
- Heater Length: 15" overall stainless steel tube for standard M7-style installations.
- Plumbing Size: 2" unions/connections for common spa plumbing setups.
- Voltage: Designed for 230–240V operation; can be configured to function in systems wired for 120V or 220–240V where supported by the pack.
- Output: 5.5 kW heating capacity for fast heat-up and strong recovery times.
- Sensors: Dual built-in M7-type sensors mounted on the tube for temperature and flow monitoring.
- Mounting Studs: None (smooth tube body), ideal where studless replacement is required.
Housing & Orientation
- Housing Configuration: Straight flow-thru design so water passes directly through the heater body.
- Heater Size: 2" diameter heater tube to match standard Balboa 2" unions.
- Threaded Tap Orientation: 12 o’clock position for wiring and connections in typical control box layouts.
- Sensor Stud Orientation: 12 o’clock, aligning with M7-style control system expectations.
Replacement Cross-References
This G7518 heater is intended as a backwards-compatible replacement for numerous older 5.5 kW M7 heaters, including but not limited to:
- Balboa MFG #58083, 58010, 58121, 58209
- Balboa MFG #58064, 58000, 58123, 58089
- Balboa MFG #58086, 58105
- MFG X300930 (commonly associated with Master Spas applications)
Features & Benefits
- New-model stainless steel 2" x 15" tube for improved durability and corrosion resistance in spa environments.
- 5.5 kW M7 element provides strong heating performance while working seamlessly with M7 controls that rely on tube-mounted sensors instead of a pressure switch.
- Built-in dual sensors simplify installation by eliminating separate external sensor mounting and wiring.
- Backwards compatible with older 5.5 kW Balboa M7 heater part numbers, making it the current model replacement for many legacy systems.
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Studless design makes it easier to fit into packs and manifolds that do not require or cannot accommodate mounting studs.
This G7518 Balboa 5.5 kW M7 heater assembly is ideal when upgrading or replacing an older 5.5 kW M7 heater with 2" x 15" dimensions and dual in-tube sensors, providing a modern, stainless steel, OEM-quality solution that works with many Balboa-based spa systems.
