5.5KW 230V Flow Thru Heater G7518

Name: 5.5KW 230V Flow Thru Heater G7518
Brand: Balboa
SKU: G7518
Price: 310.45 USD
Availability: InStock

Part #: G7518

$310.45

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

About this heater

This Balboa G7518 flow-through heater assembly delivers reliable 5.5kW heating power at 230V for your spa system. Engineered by Balboa, a trusted name in spa electronics, this OEM replacement heater provides the exact performance specifications your spa was designed for. The flow-through design ensures efficient heat transfer while maintaining optimal water circulation through your spa's plumbing system.

Built to Balboa's exacting standards, this heater assembly comes with our exact fit guarantee and ships the same day your order is placed. Backed by our comprehensive 1-year warranty, you can trust this genuine replacement part to restore your spa's heating capability. Professional installation is recommended to ensure proper electrical connections and plumbing integration - always verify voltage requirements and heater specifications match your spa's system before installation.

Exact part number

G7518

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

Balboa flow-through heater
in-line spa heater
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:

Spa water won't heat
HH or OH error code on topside display
Heater trips breaker on startup
Spa heats intermittently or slowly
Burnt or corroded heater element visible on inspection

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

Before you buy — quick checklist

Confirm your spa's heater bay accepts a 5.5kW element — some systems are rated for 4.0kW or 6.0kW only
Verify your spa runs on 230V and not 120V before ordering
Locate your existing heater's SKU or part number and cross-reference to G7518 before purchasing
Check union size and inlet/outlet orientation on your current heater to ensure plumbing alignment
Confirm your spa control system is Balboa — this is an OEM Balboa part and is optimized for Balboa boards

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

Medium — Some experience neededTypically 45–90 minutes

What's in the box

5.5kW 230V flow-through heater assembly
Mounting hardware

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.