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Cal Spa 5.5KW Flow Thru Heater C2550-2001 230V - Bubbles Supply

Cal Spa 5.5KW Flow Thru Heater C2550-2001

Part #: C2550-2001

$136.40
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About this heater

The Cal Spa 5.5KW Flow Thru Heater C2550-2001 is a genuine OEM replacement heater assembly designed for Cal Spas hot tubs requiring a 5.5kW heating element. This 230V heater features a 2-inch connection with 15-inch overall length, delivering reliable performance to restore your spa's heating capability. Built to Cal Spa's exact specifications, this flow-through heater efficiently heats water as it circulates through your spa's plumbing system.

At Bubbles Supply, we guarantee this heater will be an exact fit for your Cal Spa system, backed by our 1-year warranty and same-day shipping on in-stock orders. This genuine Cal Spa heater eliminates compatibility concerns and ensures optimal performance with your existing control system. Proper installation requires electrical and plumbing knowledge – always verify your spa's voltage requirements and heater specifications before installation to ensure safe, proper operation.

Exact part number

C2550-2001

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Also known as / Replaces

This part replaces or is interchangeable with:

  • 5.5kW spa heater element
  • Cal Spa heater assembly
  • flow-through heater
  • inline spa heater

Looking for an older part number? Check our supersession lookup tool

Technical specifications

Voltage
230V
Union size
2 inch

Plumbing notes

  • Union size: 2 inch

Need help measuring? Email hello@bubblessupply.com with a photo of your existing plumbing.

Common symptoms this part fixes

If your spa is showing any of these signs, this part is likely your fix:

  • Spa not heating or heating very slowly
  • HH (High Heat) error code on control panel
  • OH (Overheat) fault code triggering repeatedly
  • Heater element burned out or failed continuity test
  • Water temperature not reaching or holding set point
  • Visible corrosion, scaling, or physical damage on existing heater tube

Not sure if this is your problem? Try our diagnostic centre or .

Before you buy — quick checklist

  • Confirm your spa runs on 230V — do not install on a 120V system
  • Verify your existing heater is rated 5.5kW and matches this assembly
  • Measure your current heater tube length — this unit is 15 inches overall
  • Confirm your plumbing uses 2-inch connections at the heater unions
  • Check that your Cal Spa control board is compatible with a 5.5kW load before replacing
  • Note your existing pressure switch and sensor locations — confirm they transfer to this assembly

Reading the checklist now prevents 90% of returns. Worth the 60 seconds.

Install difficulty: Hard — Technician recommendedTypically 60-120 minutes

Warranty

1 year warranty against defects

Covers manufacturing defects. Does not cover improper installation, normal wear, or accidental damage.

Warranty claims: warranty@bubblessupply.com

Perfect Fit Guarantee

Ordered with our help and the part doesn't fit? Contact us before installation. We'll resolve it with an exchange, replacement recommendation, or return approval.

Learn about our Perfect Fit Guarantee →

Shipping

We ship across the US and Canada. US orders ship from our US warehouse to US customers; Canadian orders ship from our Canadian warehouse to Canadian customers — no cross-border shipping, no surprise duties. In-stock orders placed before 3pm CT ship same day. Standard shipping $9.95 flat rate. Free shipping on orders over $200. Express options available at checkout.

Returns

30-day hassle-free returns on unused parts in original packaging. Contact us before returning to receive your RMA number.

Frequently asked questions

Check the Compatibility section above to confirm fitment for your spa brand and model. If your model is not listed, use our fitment selector at /pages/find-my-part or ask our parts AI for a personalized recommendation.

In-stock orders placed before 3pm CT ship the same day. You will receive tracking information by email as soon as your order ships.

We accept returns within 30 days of delivery for unused items in original packaging. Email returns@bubblessupply.com with your order number to start a return. Installed electrical parts cannot be returned for safety reasons.

Yes, all new parts come with a 1-year warranty against manufacturing defects. Warranty does not cover damage from improper installation or normal wear and tear.

Customer reviews

AI Fitment Assistant

Tell us your spa model and we will confirm this part fits before you buy.

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