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2.5 HP EX2 Spa Pump 2 Speed 230V 3421020-1U 2.50HP 230V - Bubbles Supply

2.5 HP EX2 Spa Pump 2 Speed 230V 3421020-1U

Part #: 3421020-1U

$994.86
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this spa pump

This Waterway EX2 2.5 HP main pump delivers reliable two-speed operation for medium to large residential spas requiring 230V power. Built with Waterway's proven EX2 design, this pump features a robust 48Y frame motor drawing 10.4/2.9 amps and 2-inch male buttress thread (MBT) connections for secure plumbing integration. The dual-speed functionality provides efficient filtration at low speed and powerful hydrotherapy performance at high speed.

When you order this genuine Waterway replacement pump from Bubbles Supply, you get our exact fit guarantee ensuring seamless compatibility with your existing spa system. We ship same-day from our Canadian warehouse and back every pump with a full 1-year warranty for complete peace of mind. Verify your current pump's horsepower, voltage, and connection size before ordering to ensure proper fitment and optimal spa performance.

Exact part number

3421020-1U

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 3421020-1U replacement pump
  • EX2 Main Pump 230V
  • Waterway EX2 2.5HP 2-Speed Pump

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

Technical specifications

Voltage
230V
Horsepower
2.5 HP
Frame size
48Y
Speed
Two-speed
Amperage
10.4A high speed / 2.9A low speed @ 230V

Common symptoms this part fixes

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

  • Pump won't start or trips breaker immediately
  • Motor hums but impeller won't spin
  • Weak or no jet pressure at high speed
  • Spa stuck in low speed β€” won't switch to high
  • Pump runs but DR or FLO error code persists on spa topside
  • Visible seal leak causing water under the equipment bay

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

Before you buy β€” quick checklist

  • Confirm voltage on your existing pump label is 230V β€” this pump is not dual voltage
  • Verify your current pump is rated 2.5 HP and 48Y frame before ordering
  • Check your plumbing connection size and thread type to confirm 2-inch MBT compatibility
  • Identify whether your spa requires a two-speed pump β€” some systems are wired for single-speed only
  • Note your existing pump's wet end port orientation before removal to ensure the replacement fits your cabinet layout
  • Take a photo of your existing pump label (brand, model, HP, voltage, amps) for your records before disconnecting

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

Install difficulty: Medium β€” Some experience neededTypically 60–90 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 β†’

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 β€” 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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