🚀 New launch promo — 10% off orders over $300. Use code LAUNCH10
Bubbles Supply
Not sure which part you need? Upload a photo and we'll find it. →
2-Pump 4-Relay 5.57 Circuit Board 6600-720 - Bubbles Supply
Exact Fit

2-Pump 4-Relay 5.57 Circuit Board 6600-720

Part #: 6600-720

$1206.87
In stock — ships today
Qty
🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
Add to B2B order list

Not sure this fits?

Send us a photo of your old part — we'll confirm the right replacement before you order.

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

About this spa pump

This 2-pump 4-relay circuit board (model 6600-720) is a genuine OEM replacement control board designed for Sundance and Jacuzzi spa systems. The Rev 5.57 LX-15 board manages dual pump operations and four relay functions, providing complete electronic control for your spa's heating, filtration, and jet systems.

Built to original manufacturer specifications, this control board delivers reliable performance and seamless integration with existing Sundance spa electrical systems. At Bubbles Supply, we guarantee an exact fit for your spa and ship the same day for minimal downtime. Every circuit board includes our comprehensive 1-year warranty for complete peace of mind. Before installation, ensure power is completely disconnected and verify all wire connections match your existing board configuration for safe, proper operation.

Exact part number

6600-720

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 2-Pump 4-Relay Board
  • LX-15 Control Board
  • Rev 5.57 LX-15 Circuit 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 displays error codes and won't recover
  • Jets won't activate despite pump running
  • Heater not responding to thermostat commands
  • One or both pumps non-functional
  • Spa stuck in or won't enter filtration cycle
  • Relays clicking but no output to components

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

Before you buy — quick checklist

  • Confirm your existing board is marked Rev 5.57 or LX-15 — revision mismatches can cause control issues
  • Verify your spa has a 2-pump, 4-relay configuration before ordering
  • Check that your current board's wiring harness connectors match the 6600-720 layout
  • Confirm this is a Sundance or Jacuzzi branded spa — not all brands use compatible control packs
  • Document or photograph all wire positions on the old board before removal to ensure correct reinstallation

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

Install difficulty: 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.

🔒 Secure checkout · SSL encrypted·🇺🇸🇨🇦 Serving the US and Canada·↩️ 30-day hassle-free returns·📦 Same-day fulfillment