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BP7 Spa Control 4.0KW Flow Thru Heater G6405 - Bubbles Supply

BP7 Spa Control 4.0KW Flow Thru Heater G6405

Part #: G6405

$1034.87
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this heater

The BP7 Spa Control 4.0KW Flow Thru Heater G6405 is a genuine Balboa replacement heater designed for spas equipped with BP7 control systems and TP500 topside panels. This 4.0kW flow-through heater provides reliable water heating for your spa while integrating seamlessly with your existing Balboa electronics package.

Built to Balboa's OEM specifications, this heater offers the exact fit you need to restore proper heating function to your spa. At Bubbles Supply, we guarantee exact fitment, ship same-day from our Canadian warehouse, and back every heater with a full 1-year warranty. Whether you're troubleshooting HH or OH error codes or simply replacing a worn heater element, this genuine Balboa part delivers the performance and reliability your spa deserves. Verify your current control system model and heater specifications before ordering to ensure proper compatibility.

Exact part number

G6405

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • Balboa flow-through heater
  • BP7 flow thru heater
  • BP7 heater
  • G6405 heater element

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

Technical specifications

Voltage
240V
Port type
Flow-through (inline)

Plumbing notes

  • Port type: Flow-through (inline)

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:

  • HH error code displayed on topside panel
  • OH error code displayed on topside panel
  • Spa water not heating or heating slowly
  • Heater not activating when set temperature is called
  • Spa tripping GFCI repeatedly due to failed heater 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 control system is a Balboa BP7 pack — check the label on the equipment bay board
  • Verify your topside panel is a TP500 — this heater is spec'd for that pairing
  • Check whether your HH or OH error is heater-related or a sensor/flow issue before replacing the heater
  • Inspect your existing heater for corrosion, pin-hole leaks, or burned terminals to confirm the heater is the failed component
  • Note your existing heater's kW rating — this is a 4.0kW unit and must match your system's configured output

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

  • BP7 4.0kW flow-through heater assembly
  • Replacement heater gaskets or O-rings (verify contents upon receipt)

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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