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Large Frame 2-1/2" 4.0HP 230V Pump 56WUA400A-II Suction & Discharge 4.00HP 230V - Bubbles Supply

Large Frame 2-1/2" 4.0HP 230V Pump 56WUA400A-II Suction & Discharge

Part #: 56WUA400A-II

$770.58
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About this spa pump

The LX 56WUA400A-II is a powerful 4.0HP main circulation pump engineered for larger residential spas and hot tubs requiring robust water flow. This large frame pump operates on 230V power and features both suction and discharge connections for complete circulation system integration.

Built with LX's proven reliability standards, this pump delivers the performance needed for spas with higher capacity demands while maintaining energy efficiency. At Bubbles Supply, we guarantee this is the exact replacement you need, backed by our 1-year warranty and same-day shipping on in-stock items. The large frame design ensures compatibility with spa systems originally equipped with similar high-output pumps. Always verify your current pump's electrical specifications and plumbing connections match before installation to ensure proper fit and optimal performance.

Exact part number

56WUA400A-II

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Also known as / Replaces

This part replaces or is interchangeable with:

  • 56WUA400A-II
  • LX 4HP 56-Frame Pump
  • LX Large Frame Pump 4.0HP

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

Technical specifications

Voltage
230V
Horsepower
4.0 HP
Frame size
56Y frame
Port type
Suction and discharge

Plumbing notes

  • Port type: Suction and discharge

Need help measuring? Email hello@bubblessupply.com with a photo of your existing plumbing.

Common symptoms this part fixes

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

  • Pump won't prime or start
  • Motor hums but impeller won't spin
  • Weak or low water flow throughout spa
  • Pump trips breaker on startup
  • Leaking from pump volute or seal
  • Error code DR (Flow/Dry) on spa controller

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

Before you buy — quick checklist

  • Confirm your existing pump is 230V — do not install a 230V pump on a 110V circuit
  • Verify the 4.0HP rating matches the label on your current pump exactly — do not upsize or downsize without checking your spa's plumbing and electrical capacity
  • Confirm your spa has a 56Y frame motor mount — measure bolt pattern and compare to existing pump footprint
  • Check your existing plumbing union sizes and thread type before ordering to ensure connection compatibility
  • Note whether your current pump is single-speed or two-speed — confirm this pump matches your controller wiring
  • Locate your spa's breaker rating to confirm it can handle the startup amp draw of a 4.0HP motor

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

Install difficulty: Hard — Technician recommendedTypically 60-120 minutes

What's in the box

  • LX 56WUA400A-II pump assembly
  • Motor with wet end pre-assembled

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.

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