🚀 New launch promo — 10% off orders over $300. Use code LAUNCH10
Bubbles Supply
Not sure which part you need? Upload a photo and we'll find it. →
4.0KW 230V Flow-Thru Heater 53349 230V - Bubbles Supply

4.0KW 230V Flow-Thru Heater 53349

Part #: 53349

$384.18
In stock — ships today
Qty
🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
Add to B2B order list

Not sure this fits?

Send us a photo of your old part — we'll confirm the right replacement before you order.

Upload a Photo

Also replaces

53349
1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this heater

This 4.0KW 230V flow-thru heater assembly is a genuine Balboa replacement part designed for Jacuzzi R574 and R576 series spas. Operating at 230 volts with 4,000 watts of heating power, this OEM heater delivers reliable performance to maintain your spa's optimal water temperature. The flow-thru design ensures efficient heat transfer while protecting the heating element from damage.

At Bubbles Supply, we guarantee this heater is the exact fit for your spa system, backed by our comprehensive 1-year warranty and same-day shipping commitment. This genuine Balboa part addresses common heater failure codes including HH (high heat) and OH (overheat) error messages. Professional installation is recommended to ensure proper electrical connections and flow sensor integration with your spa's control system.

Exact part number

53349

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 4.0KW heater tube assembly
  • 53349
  • Balboa flow-thru heater assembly
  • spa heater element assembly

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

Technical specifications

Voltage
230V

Common symptoms this part fixes

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

  • HH (high heat) error code on spa display
  • OH (overheat) fault code not clearing
  • Spa not reaching set temperature
  • Heater not activating despite pump running
  • Water temperature dropping below set point
  • Control system locking out due to repeated overheat faults

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

Before you buy — quick checklist

  • Confirm your spa is a Jacuzzi R574 or R576 series before ordering
  • Verify your spa runs on 230V — do not install on a 115V system
  • Check whether your current heater failure is element-related vs. a failed high-limit sensor or pressure switch — replacing the full assembly covers all of these, but diagnose first
  • Inspect heater unions and plumbing connections for cracking or scale buildup before reinstalling
  • Confirm your Balboa control board is functional — a failed board can cause repeated heater faults that a new heater alone won't fix

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

Install difficulty: Medium — Some experience neededTypically 45–90 minutes

What's in the box

  • 4.0KW 230V flow-thru heater assembly
  • Integrated high-limit sensor(s)
  • Flow sensor (if included with assembly)
  • Replacement O-rings or gaskets

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.

🔒 Secure checkout · SSL encrypted·🇺🇸🇨🇦 Serving the US and Canada·↩️ 30-day hassle-free returns·📦 Same-day fulfillment