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5.5 KW Mid Terminal Heater Element Flo-Thru, 624552M
Was: $69.12Now: $59.95 -
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5.5 KW Flo Thru Heater Element, Balboa Double Bend, 25-4034BI
Was: $44.15Now: $38.95 -
Flo Thru Epoxy Potted Element, 5.5 KW, 240V
Was: $46.12Now: $38.95
Uncoated
Uncoated heater elements are the standard, non-coated resistive heating cores used in the majority of hot tub and spa systems. Without an extra protective layer on the sheath, they rely on the base material (Incoloy for general corrosion resistance, stainless steel for added durability, or titanium for superior protection) to withstand water exposure, making them ideal for spas with well-maintained chemistry and lower mineral content.
This category includes replacement uncoated heater elements and direct fits, in popular ratings: 4.0kW, 4.5kW, 5.5kW, 6.0kW, 8.0kW, and 11.0kW (120V or 240V), with screw-in (1-1/4" NPT thread), flange-mount (bolt-on), clamp-on, square-back, or center-terminal styles. Compatible with Balboa (M7/VS/BP), Gecko (in.ye/in.stream), HydroQuip universal, Sundance/Jacuzzi, Watkins No-Fault, Brett Aqualine, ACC/CTI, and most aftermarket manifolds. These are the go-to choice when cost-effective performance is prioritized over maximum scale resistance.
Uncoated elements vary by wattage/voltage, sheath material/length/diameter/bend (straight, U-bend, or custom), mounting type (thread/flange/clamp/square), watt density (matched to flow rate), and manifold compatibility—precise matching ensures proper fit, secure sealing with gaskets/O-rings, and reliable heating without premature failure.
Common problems include no heat from burnt-out coils, scale/mineral buildup on the uncoated sheath reducing efficiency (more frequent in hard water), corrosion/pitting in non-titanium sheaths exposed to salt or imbalanced chemistry, breaker trips from shorts, or shorter lifespan compared to coated versions in challenging conditions. Replacing an uncoated heater element is straightforward and budget-friendly—restoring full heating power when water chemistry is properly balanced.
To select the right uncoated heater element:
- Confirm your spa brand/model, control pack, voltage, kW rating, manifold type/opening, mounting style, sheath length, and any markings on the existing element.
- Check water chemistry history, visible scale/corrosion, or heating-related error codes.
- Avoid guessing—send us clear photos of your current heater element (showing sheath surface/appearance, mounting flange/thread, labels/markings, manifold opening, wiring terminals, and spa label with model/serial number) for expert verification.
**Text or send photos to: 772-800-5445**
**Or call us at: 844-500-4645**
We'll confirm compatibility before you order.
SpaShopper is not affiliated with any spa manufacturer. Brand names and part numbers are used for compatibility and identification purposes only.
Shop our uncoated heater elements today for reliable, cost-effective heating solutions that perform great in balanced spa water.