Exact Fit

2-Pump 4-Relay 3.61 Circuit Board 6600-726

Name: 2-Pump 4-Relay 3.61 Circuit Board 6600-726
Brand: Sundance Spas
SKU: 6600-726
Price: 985.58 USD
Availability: InStock

Part #: 6600-726

$985.58

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

About this spa pump

This 2-pump 4-relay circuit board (part #6600-726) is the control brain for Sundance and Jacuzzi spa systems requiring LX-15 Rev 3.61 electronics. Designed to manage dual pump operations through four independent relays, this OEM replacement board delivers precise control over your spa's heating, filtration, and jet functions.

Built to exact Sundance specifications, this circuit board ensures seamless integration with your existing control pack system. At Bubbles Supply, we guarantee an exact fit for your spa's electronics, back every board with our comprehensive 1-year warranty, and ship same-day to get your spa running quickly. Professional installation is recommended due to electrical connections and safety considerations—always verify your original board's part number and relay configuration before installation to ensure proper compatibility.

Exact part number

6600-726

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

2-pump relay board
LX-15 Rev 3.61 board

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

Fits these brands and models

Compatible brands

Sundance SpasJacuzzi

Not sure if it fits your spa? Send us a photo — we'll confirm before you order

Common symptoms this part fixes

If your spa is showing any of these signs, this part is likely your fix:

Spa won't heat
Pumps won't turn on
Relays clicking but no pump response
Erratic pump operation
No power to accessories
Control panel not responding to pump commands

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

Before you buy — quick checklist

Verify your board shows part number 6600-726
Confirm you have a 2-pump system with 4 relays
Check that your system requires LX-15 Rev 3.61 electronics
Take photo of existing wiring connections
Ensure power is off at main breaker before removal

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

Hard — Technician recommendedTypically 45-90 minutes

What's in the box

Circuit board assembly
Mounting screws

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.