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5.5kW 230V Flow-Thru Heater 775-5001 240V - Bubbles Supply

5.5kW 230V Flow-Thru Heater 775-5001

Part #: 775-5001

$646.43
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this heater

The Waterway 5.5kW 230V Flow-Thru Heater (775-5001) is a complete heater assembly designed for mid-to-large capacity spas requiring reliable 5500-watt heating performance. This flow-through style heater features built-in temperature and high-limit sensors for safe operation and precise water temperature control. The 230-volt configuration makes it suitable for most residential spa installations with standard electrical service.

Built to Waterway's OEM specifications, this heater assembly delivers the exact fit and performance your spa was designed for. At Bubbles Supply, we guarantee exact fitment and back every heater with our comprehensive 1-year warranty. Orders ship same day to get your spa heating again fast. Professional installation is recommended due to electrical and plumbing connections—always verify your spa's voltage and wattage requirements before installation.

Exact part number

775-5001

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Also known as / Replaces

This part replaces or is interchangeable with:

  • 5.5kW spa heater assembly
  • 5500 watt spa heater
  • flow-through heater element
  • Waterway flow-thru heater

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

Technical specifications

Voltage
230V
Amperage
23.9A @ 230V

Common symptoms this part fixes

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

  • Spa water not heating or heating very slowly
  • Heater error code on control panel (HH or OH fault)
  • High-limit sensor tripping repeatedly
  • Spa reaches setpoint temperature then immediately drops
  • Heater element failure confirmed by continuity test
  • Spa controller showing open or failed heater circuit

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 at 5.5kW/5500W before ordering
  • Check that your current heater is the flow-thru style, not a manifold or in-line style
  • Match the union size and plumbing inlet/outlet orientation to your existing installation
  • Note whether your spa uses a separate high-limit sensor or relies on the integrated sensor in this assembly
  • Always shut off and lock out power at the breaker before beginning any heater work

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

Install difficulty: Hard — Technician recommendedTypically 60-120 minutes

What's in the box

  • 5.5kW 230V flow-thru heater assembly
  • Integrated temperature and high-limit sensors
  • Heater union tailpieces (verify included in shipment before discarding packaging)

If your order is missing any items listed above, contact hello@bubblessupply.com within 48 hours of delivery.

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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