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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.

Heater Assemblies, Low Flow

Heater assemblies, low flow are compact, efficient flow-thru heating units engineered for spas with lower water circulation rates, typically using a dedicated circulation pump or low-GPM setups. These assemblies heat water effectively at reduced flow (often 8-15 GPM minimum), preventing dry firing through integrated pressure/flow switches, hi-limits, and sensors—ideal for energy-saving designs without high-maintenance high-flow requirements.

This category includes replacement low flow heater assemblies and cross-compatible options, in ratings like 4.0kW, 5.5kW (240V primary, some dual-voltage 120V/240V), with vertical canister, square-back (e.g., Sundance/Jacuzzi smart heaters), tube-style, or Laing-style manifolds (1"–2" plumbing), titanium elements for corrosion resistance, and features like thermowells, sensor taps, mounting brackets, or auto-reset hi-limits. Compatible with brands such as Sundance (Sentry 750/800/850, 6500-310/6500-402 series), Jacuzzi (6500-063), Hot Spring/Watkins (No-Fault, 26-C3160 series), Dimension One (M-Class/Laing), Caldera, and universal HydroQuip/Balboa vertical low-flow models.

Low flow assemblies vary by kW output, voltage, manifold style (vertical, square-back, tube), element material (titanium preferred), sensor/pressure switch integration, plumbing size, and spa pack compatibility—precise matching is essential for proper flow detection, no leaks, and error-free performance (e.g., avoiding FLO, HL, OH codes).

Common problems include no heat from failed elements or sensors, flow errors from stuck pressure switches, clogs, or insufficient circulation, overheating/hi-limit trips due to scale buildup or low flow, leaks at unions/gaskets from wear, corrosion in non-titanium units, or intermittent heating in older systems. Replacing the full low flow heater assembly is often the best solution—especially for energy-efficient spas—restoring reliable, quick heating with minimal downtime.

To select the right low flow heater assembly:
- Identify your spa brand/model, year, control system, voltage, kW rating, manifold style/size, plumbing connections, and part numbers (e.g., 6500-310, C3226-1A, 26-C3160-1S).
- Note error codes, flow symptoms, or visible markings on the manifold/element.
- Avoid guessing—send us clear photos of your existing low flow heater (showing manifold shape, element label, pressure switch, sensors, unions, wiring, control pack, 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 low flow heater assemblies today to maintain efficient, energy-smart heating and enjoy consistently warm spa water.

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