Gecko Heat.Wav 5.5kW Flow-Thru Spa Heater, Model 9920-100347, is a purpose-built replacement designed to restore fast, reliable heating in Gecko M-Class spa packs. This complete heater tube comes ready to install, with the element, pressure switch, and unions on both ends—so you can swap in without hunting for extra parts.
Designed for efficiency and durability, this flow-thru heater delivers heat directly as water passes through the element, giving steady performance even during high-demand spa sessions. The robust construction includes threaded mounting studs for secure, leak-free installation inside the M-Class spa pack enclosure.
Key features
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Heater Type: Flow-Thru
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Wattage: 5.5 kW
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Voltage: 230 V
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Inlet/Outlet: 2" compression connections
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Length: 15"
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Includes: Element, pressure switch, unions on both ends, threaded mounting studs
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Compatibility: Specifically designed to fit the Gecko M-Class spa pack enclosure
Why this Gecko replacement stands out
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Plug-and-play compatibility: Engineered to drop into the M-Class enclosure without modifying existing plumbing or electricals.
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All-in-one kit: Comes with pressure switch and unions already installed, reducing installation time and potential leaks.
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Reliable flow-through heating: Direct-water heating minimizes warm-up time and maintains consistent spa temperature during operation.
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Durable fit for spa environments: Built to withstand the moisture-rich, high-heat conditions typical of hot tub systems.
Ideal use cases
- Replacing a worn or failing heater in Gecko M-Class spa packs to restore rapid and consistent heating.
- Upgrading a spa heating system that requires a 230V, 5.5 kW flow-through solution with 2" inlet/outlet fittings.
- Maintenance-friendly retrofit for service professionals performing standard Gecko spa pack servicing.
Installation and compatibility notes
This heater is a complete tube assembly with threaded mounting studs and unions on both ends, designed to mount inside the Gecko M-Class spa pack enclosure. It is specifically specified to fit the M-Class configuration, ensuring proper alignment with your existing plumbing and electrical connections. Verify water flow and electrical supply match the 230 V, 5.5 kW rating before installation to ensure optimal performance.
| Heater Type |
Flow Thru |
| Heater Wattage |
5.5kW |
| Inlet Size |
2" |
| Outlet Size |
2" |
| Type |
Standard |
| Voltage |
230 |
| Length |
15" |
