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5.5KW 230V Stand-Alone Heater RHS-5.5 - Bubbles Supply

5.5KW 230V Stand-Alone Heater RHS-5.5

Part #: RHS-5.5

$1303.25
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Fits these systems

HydroQuip

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

Before you buy — quick checklist

  • Confirm your spa runs on 230V — this heater is not compatible with 115V systems
  • Verify the failed heater is a stand-alone unit, not integrated into a combo pack
  • Match the KW rating — replacing with a higher or lower wattage than your system was designed for can cause control board faults
  • Check your existing heater's union size and plumbing connections before ordering
  • Confirm your spa's control system is compatible with a HydroQuip stand-alone heater assembly
  • Inspect high limit sensor and pressure switch before installing — a faulty sensor is often the root cause of repeated heater failures

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

Exact part number

RHS-5.5

Save this for ordering or warranty claims

Technical specifications

Voltage
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
  • Heater not reaching set temperature
  • HH fault code on control panel
  • OH fault code (overheating/high limit trip) caused by failed heater element
  • Spa heater element burned out or corroded
  • Inconsistent water temperature

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

About this heater

Replace your failed spa heater with this HydroQuip Heatmax 5.5KW 230V stand-alone heater assembly, designed for hot tubs and spas requiring reliable heating performance. This OEM replacement delivers 5,500 watts of heating power at 230 volts, making it suitable for medium to large spa installations that need consistent water temperature control.

Built to HydroQuip's exacting standards, this heater assembly provides the exact fit and performance your spa was designed for. We guarantee precise fitment and back every heater with our comprehensive 1-year warranty, plus same-day shipping to get your spa running quickly. Professional installation is recommended to ensure proper electrical connections and system integration—always verify voltage requirements and heater specifications match your spa's original equipment before installation.

Also known as / Replaces

This part replaces or is interchangeable with:

  • 5500W spa heater
  • HydroQuip Heatmax 5.5KW
  • RHS-5.5 heater assembly

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

Install difficulty: Hard — Technician recommendedTypically 60-120 minutes

What's in the box

  • HydroQuip RHS-5.5 heater assembly
  • High limit sensor
  • Pressure switch

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.

AI Fitment Assistant

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

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