Balboa M7 3kW Spa Heater – Incoloy Element (2” Connections)
The Balboa M7 3kW Spa Heater is a highly reliable flow-through heater designed for use with the majority of Balboa M7 control systems, including GS Series, GL2000, and GL2001 systems (excluding GL8000).
Featuring a durable Incoloy heating element, this heater is ideal for most hot tub and spa applications, offering excellent corrosion resistance and long service life.
Unlike traditional systems that rely on pressure or flow switches, Balboa’s M7 sensor technology uses two temperature probes inside the heater tube to accurately monitor water flow and temperature. This design significantly improves reliability by eliminating mechanical moving parts.
Key Features
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Power Output: 3.0kW
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Voltage: 230V / 50–60Hz
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Element Type: Incoloy
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Sensor Technology: M7 dual internal probes
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Minimum Flow Rate: 75 litres per minute (4.5 m³/hour)
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Plumbing Connections: 2” unions
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Mount Type: Clip-mounted
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Flow Type: Flow-through heater
Compatibility
Compatible with a wide range of Balboa spa packs and systems, including:
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GS500, GS500Z
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GS501, GS501Z (3.0kW only), GS501SZ
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GS510, GS510S, GS510Z, GS510SZ
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GS511SZ, GS523DZ
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GL2000 Mach 3
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GL2001 Mach 3
Used in many spa brands including Spaform, Hydrospa, Canadian Spa, Aegean, Catalina, Hydropool, Marquis Spa, Leisure Bay, Signature Spas, and Hot Tubs Direct.
Dimensions
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Heater Length (barrel only): 381mm
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Overall Length (including tails): 495mm
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Pipe Size: Typically connected to 2” pipework
Connections
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Suitable for direct replacement of existing M7 heaters
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For new installations, tailpieces for 2” or 1.5” pipework may be required
Part Numbers & Cross References
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Balboa Incoloy: 58107 (replaces 58118)
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Balboa Titanium: 55626
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HydroQuip: 26-58118-K
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Marquis Spa: 740-0656
This heater is equivalent to part 55626, but fitted with an Incoloy element instead of titanium.
Electrical Specifications
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Power: 3.0kW
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Current Draw: 11.5–12.0 Amps
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Terminal Spacing: 31.75mm
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Element Length: 10” (255mm)
Important Installation Note
Always secure the terminal base with an appropriate spanner or long-nose pliers before tightening or loosening the 10mm terminal nuts to prevent internal damage.
