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56Y Frame 2" MBT x 2" MBT Wet End WE-56WUA400II 4.00HP - Bubbles Supply

56Y Frame 2" MBT x 2" MBT Wet End WE-56WUA400II

Part #: WE-56WUA400II

$174.69
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About this wet end

This LX 56Y frame wet end assembly is designed for LX main pumps in hot tubs and spas requiring a 4.0HP configuration. The WE-56WUA400II features dual 2" MBT (male buttress thread) connections for reliable plumbing integration and maintains the precise tolerances needed for optimal pump performance in your spa system.

Built to LX's OEM specifications, this wet end delivers the exact fit you need to restore your spa's circulation power. At Bubbles Supply, we guarantee precise fitment and back every wet end with our comprehensive 1-year warranty. Orders ship the same day to get your spa running quickly. Before installation, verify your existing pump frame matches the 56Y configuration and confirm the 2" MBT threading aligns with your current plumbing setup for seamless replacement.

Exact part number

WE-56WUA400II

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Also known as / Replaces

This part replaces or is interchangeable with:

  • 4HP wet end assembly
  • LX 56Y wet end
  • WE-56WUA400II wet end

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

Technical specifications

Horsepower
4.0 HP
Frame size
56Y frame
Union size
2 inch unions

Plumbing notes

  • Union size: 2 inch unions

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 leaking from wet end
  • Cracked or damaged wet end housing
  • Worn impeller housing causing cavitation
  • Poor water flow due to wet end wear
  • Pump making grinding noises
  • Visible damage to wet end assembly

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

Before you buy — quick checklist

  • Verify your pump has a 56Y frame configuration
  • Confirm existing plumbing uses 2 inch MBT connections
  • Check that your motor is rated for 4.0 HP
  • Measure existing wet end to confirm fitment
  • Turn off power and drain spa before starting
  • Ensure you have proper tools for MBT connections

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

Install difficulty: Medium — Some experience neededTypically 45-90 minutes

What's in the box

  • Wet end assembly
  • O-ring seals
  • Installation gaskets

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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