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5.5kW 230V 45-Degree Flow Thru Heater A2550-5251ET 230V - Bubbles Supply

5.5kW 230V 45-Degree Flow Thru Heater A2550-5251ET

Part #: A2550-5251ET

$458.87
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this heater

This 5.5kW 230V flow-through heater assembly from HydroQuip delivers reliable heating performance for Arctic Spas and compatible spa systems. The 45-degree curved design optimizes water flow while the 5500-watt heating element provides efficient temperature control for your spa experience. Built to HydroQuip's OEM specifications, this heater assembly maintains the exact performance standards your spa was designed for.

At Bubbles Supply, we guarantee this heater is an exact fit for your system and back it with our comprehensive 1-year warranty. Your replacement ships the same day you order, minimizing downtime. Professional installation is recommended to ensure proper electrical connections and optimal performance. Verify your existing heater's specifications including voltage, wattage, and mounting configuration before ordering to ensure compatibility with your spa's control system.

Exact part number

A2550-5251ET

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Also known as / Replaces

This part replaces or is interchangeable with:

  • 45-degree heater tube
  • Flow-through heater assembly
  • HydroQuip flow thru heater
  • inline spa heater

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

Technical specifications

Voltage
230V
Amperage
23.9A @ 230V
Port type
45-degree flow-through

Plumbing notes

  • Port type: 45-degree flow-through

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 water not heating
  • Heater error code on control panel
  • Spa takes excessively long to reach set temperature
  • OH (overheat) fault after element failure
  • HH (high heat) fault triggered by faulty element
  • Visible corrosion or scaling on existing heater tube

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

Before you buy — quick checklist

  • Confirm your existing heater is rated 5.5kW at 230V — do not assume based on spa size alone
  • Verify your spa control system is HydroQuip and compatible with this heater assembly
  • Check that the 45-degree tube angle matches your existing plumbing layout — a straight heater will not work as a drop-in swap
  • Confirm union sizes on your existing heater match this unit before ordering
  • Check for signs of water damage or burned wiring at the heater terminals — those issues must be resolved before installing a new heater
  • Have a licensed electrician verify the circuit if the heater tripped a breaker or caused a GFCI fault

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

Install difficulty: Hard — Technician recommendedTypically 60–120 minutes

Warranty

1 year manufacturer 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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