5.5KW 230V Water Pro Series Heater Assembly 26-310-U-K

Name: 5.5KW 230V Water Pro Series Heater Assembly 26-310-U-K
Brand: HydroQuip
SKU: 26-310-U-K
Price: 287.77 USD
Availability: InStock

Part #: 26-310-U-K

$287.77

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

About this heater

The HydroQuip 5.5KW 230V Water Pro Series Heater Assembly (26-310-U-K) is a premium titanium heating element designed for residential spas and hot tubs using HydroQuip control systems. This smart heater delivers reliable 5500-watt heating power at 230 volts, providing efficient water heating for medium to large spa applications. The titanium construction resists corrosion and scale buildup, ensuring long-lasting performance in harsh spa environments.

At Bubbles Supply, this genuine HydroQuip heater assembly comes with our exact fit guarantee, backed by comprehensive fitment expertise and same-day shipping on in-stock orders. Every Water Pro Series heater includes our standard 1-year warranty for complete peace of mind. This OEM replacement effectively resolves common "HH" and "OH" error codes on compatible systems. Verify your existing heater's part number and electrical specifications before ordering to ensure proper compatibility with your spa's control system and electrical configuration.

Exact part number

26-310-U-K

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Also known as / Replaces

This part replaces or is interchangeable with:

26-310-U-K Heater
HydroQuip Heater Assembly
Water Pro Series Heater

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 error code on HydroQuip control panel
OH (overheat) error code triggering unexpectedly
Spa water not reaching set temperature
Heater not energizing during heat cycle
Inconsistent heating or temperature fluctuations
Burned or corroded heating element causing no-heat condition

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

Before you buy — quick checklist

Confirm your control system is a HydroQuip unit — this is an OEM-specific part
Match the voltage: your spa must be wired for 230V before ordering
Record the existing heater's part number from the label before removal — verify it matches 26-310-U-K
Check your current heater's wattage rating to confirm 5.5KW is correct for your system
Inspect union fittings and manifold connections on your existing heater to ensure plumbing compatibility before ordering

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 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.