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Spa Parts Made Simple

Pumps, heaters, control boards, and replacement parts — without the confusion.

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Not sure which part fits your spa?

We make it easy to find the right replacement part — without guessing.

  1. Find your spa model
  2. Match the part number
  3. Order with confidence
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SpaShopper makes it easy to find quality hot tub and spa replacement parts without the frustration. From spa pumps and heaters to control boards, jets, filters, and plumbing components, we stock parts that fit a wide range of popular spa brands. Whether you’re fixing a heating issue, replacing a worn pump, or upgrading aging components, SpaShopper helps you get your spa running again quickly and confidently.

Flow Thru

Flow thru heater elements are the primary heating cores built for flow-thru manifolds in hot tubs and spas, where water circulates directly through the manifold and over the element sheath for fast, efficient heat transfer. These elements handle standard to high flow rates (typically 15+ GPM), with designs optimized to minimize hot spots, scale buildup, and dry firing risks when paired with proper pressure/flow switches.

This category features replacement flow thru heater elements and direct fits, in common ratings: 4.0kW, 4.5kW, 5.5kW, 6.0kW, 8.0kW, and 11.0kW (120V or 240V), with Incoloy (standard corrosion-resistant alloy), stainless steel, or titanium sheaths (best for saltwater or hard water spas). Popular mounting styles include screw-in (1-1/4" NPT thread), flange-mount (bolt-on), clamp-on, and center-terminal types. Compatible with Balboa (M7/VS/BP series), Gecko (in.ye/in.stream), HydroQuip universal, Sundance/Jacuzzi, Watkins No-Fault, Brett Aqualine, ACC/CTI, and many aftermarket flow-thru manifolds.

Flow thru elements vary by wattage/voltage, sheath material/length/diameter, mounting type (thread/flange/clamp), bend configuration (straight or slight curve), watt density (matched to flow for longevity), and manifold compatibility—precise matching ensures correct fit, secure sealing (with gaskets/O-rings), and safe, consistent heating performance.

Common problems include no heat from open-circuit or burnt-out elements, reduced heating speed from scale/mineral coating, corrosion/rupture in non-titanium sheaths exposed to salt or imbalanced chemistry, breaker trips from internal shorts, or premature failure from high-watt-density in marginal flow conditions. Replacing just the flow thru heater element is typically the most affordable and effective repair—restoring full power without swapping the entire assembly.

To choose the right flow thru heater element:
- Confirm your spa brand/model, control pack, voltage, current kW rating, manifold type (flow-thru style), mounting opening (thread/flange size), sheath specs, and any visible markings on the existing element.
- Inspect for scale, corrosion, or heating-related error codes.
- Avoid guessing—send us clear photos of your current flow thru element (showing sheath/coil shape, 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 flow thru heater elements today to get your spa heating quickly and reliably with high-performance replacements.

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