4.0KW 230V Flow-Thru Heater 26-0315-5S-KA

Name: 4.0KW 230V Flow-Thru Heater 26-0315-5S-KA
Brand: HydroQuip
SKU: 26-0315-5S-KA
Price: 456.76 USD
Availability: InStock

Part #: 26-0315-5S-KA

$456.76

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

About this heater

The HydroQuip 4.0KW 230V Flow-Thru Heater (26-0315-5S-KA) is a genuine OEM replacement heating element designed for residential spas and hot tubs equipped with HydroQuip control systems. This direct-flow heater assembly delivers 4000 watts of heating power at 230 volts, providing efficient water heating for medium to large spa installations. The flow-through design ensures optimal heat transfer while maintaining safe operating temperatures.

At Bubbles Supply, this exact-fit heater comes with our standard 1-year warranty and ships same day when ordered before our cutoff time. As Canada's spa parts authority, we guarantee this genuine HydroQuip heater will match your original equipment specifications perfectly. Professional installation is recommended to ensure proper electrical connections and flow configurations—always verify your spa's voltage requirements and heating capacity before installation to ensure optimal performance.

Exact part number

26-0315-5S-KA

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Also known as / Replaces

This part replaces or is interchangeable with:

26-0315-5S-KA Heater Element
HydroQuip 4KW Heater
HydroQuip Flow-Thru 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:

Spa water not heating
Heater error code displayed on control panel (HH or OH fault)
Water temperature dropping below set point
Heater cycling on and off repeatedly
Spa takes excessively long to reach set temperature

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 on a 120V system
Match the wattage: this is a 4.0KW unit — verify your original heater rating on the existing element or control system label
Confirm your spa uses a HydroQuip control system — check the topside controller or equipment pack label
Verify the SKU 26-0315-5S-KA against your existing heater's part number before ordering
Check that your flow switch and pressure switch are functional — a faulty flow or pressure switch is often the root cause of heater failure and will cause the new heater to fault as well

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

Hard — Technician recommendedTypically 60–120 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.