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3.6KW 230V Flo-Thru Heater Element 25-4129-TI 230V - Bubbles Supply

3.6KW 230V Flo-Thru Heater Element 25-4129-TI

Part #: 25-4129-TI

$105.29
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this heater element

The HydroQuip 3.6KW 230V Flo-Thru Heater Element (25-4129-TI) is a premium titanium replacement heating element designed for HydroQuip spa systems requiring 230-volt operation. This double-bend flo-thru design delivers reliable 3.6KW heating performance while the titanium construction provides superior corrosion resistance and extended lifespan compared to standard materials. The flo-thru configuration ensures optimal water circulation through the heating chamber for consistent temperature control.

At Bubbles Supply, we guarantee this OEM heater element provides an exact fit for your compatible spa system, backed by our comprehensive 1-year warranty and same-day shipping on in-stock items. The titanium element effectively addresses common heating issues including complete heater failure and overheating conditions. Before installation, always verify your spa's electrical requirements match the 230V specification and ensure proper water flow through the heater assembly for safe operation.

Exact part number

25-4129-TI

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 25-4129-TI
  • double-bend heater element
  • HydroQuip flo-thru heater element
  • titanium heater element

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

Technical specifications

Voltage
230V
Port type
Flo-thru (in-line)

Plumbing notes

  • Port type: Flo-thru (in-line)

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:

  • Spa water won't heat or heats very slowly
  • HH (high heat / overheat) fault code on control panel
  • OH (overheating) fault code on control panel
  • Element reads open or shorted on multimeter continuity test
  • Spa heater trips GFCI or breaker during heating cycle
  • Visible corrosion, scaling, or physical damage on existing element

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 a 230V element in a 120V system
  • Verify your existing heater assembly accepts a flo-thru (in-line) element, not an immersion-style element
  • Match the wattage — confirm your heater manifold and control system are rated for 3.6KW
  • Inspect the heater manifold and unions for cracks or scaling before ordering — a failed element can sometimes indicate flow or water chemistry issues that may damage a new element
  • Check your water chemistry and sanitizer levels before installation — high or low pH and excessive bromine/chlorine accelerate element degradation even in titanium

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

Install difficulty: Medium — Some experience neededTypically 30–60 minutes

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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