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Spa Parts Made Simple

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

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✔️ Trusted by spa owners since 2015

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.

Square

Square heater elements are specialized flange-mount heating cores with a square-shaped flange plate (usually 3"–4" sides and 4 bolt holes at corners) designed for secure bolting to square manifold openings in hot tubs and spas. This style is common in low-flow and smart heater systems, providing excellent sealing and easy service access while the coiled sheath heats water efficiently inside the manifold.

This category includes replacement square heater elements and direct fits, in typical ratings: 4.0kW, 5.0kW, 5.5kW, and 6.0kW (240V primary, some dual-voltage), with titanium sheaths for corrosion resistance (ideal for saltwater or hard water) or Incoloy for standard use. Popular models include Sundance/Jacuzzi square-back compatible (e.g., 6500-310, 6500-402, 6500-063 series equivalents), HydroQuip square-flange universals, and aftermarket titanium upgrades. Elements usually include mounting gaskets and sometimes hi-limit sensor ports or auto-reset features.

Square elements vary by wattage/voltage, sheath material/length, flange side length/hole pattern, bend style (straight or slight U-bend for flow), watt density (optimized for low-flow circulation), and compatibility with specific manifolds/control packs—precise matching prevents leaks, improper seating, or overheating.

Common problems include no heat from failed coils, slow heating or hi-limit trips from scale buildup on the sheath, gasket leaks around the square flange from wear or over-tightening, corrosion in non-titanium units with aggressive water chemistry, tripped breakers from shorts, or reduced performance in low-circulation setups. Replacing just the square heater element is economical and simple—often requiring only gasket replacement and bolt re-torquing for restored heating.

To select the right square heater element:
- Confirm your spa brand/model (e.g., Sundance, Jacuzzi), year, control pack, voltage, kW rating, flange opening size/hole pattern, sheath length, and any markings on the existing element flange.
- Check for scale, gasket condition, bolt holes alignment, or heating-related error codes.
- Avoid guessing—send us clear photos of your current square element (showing the square flange plate/hole pattern, sheath/coil, any labels/markings, manifold opening, gasket area, 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 square heater elements today to upgrade or repair your spa's heating with precise, square-flange performance and reliability.

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