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48/56Y Frame 2-1/2" MBT x 2-1/2" MBT Wet End 91042140-000 4.00HP - Bubbles Supply

48/56Y Frame 2-1/2" MBT x 2-1/2" MBT Wet End 91042140-000

Part #: 91042140-000

$97.46
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About this wet end

This is an Aqua-Flo by Gecko wet end assembly designed for 48/56Y frame spa pumps requiring 4.0HP output and 2-1/2" MBT connections. Part number 91042140-000 fits spas equipped with Aqua-Flo FMXP3 series pumps, delivering reliable water circulation for your hot tub's filtration and jet systems. The standard discharge configuration and robust construction ensure consistent performance in demanding spa environments.

At Bubbles Supply, this OEM wet end comes with our exact fit guarantee, ships same-day when ordered before cutoff, and includes a full 1-year warranty for complete peace of mind. We stock genuine Aqua-Flo components to keep your spa running at peak performance without compromise. Verify your existing pump's frame size and connection measurements before installation—both suction and discharge ports must match the 2-1/2" MBT threading for proper fit.

Exact part number

91042140-000

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 2.5 MBT wet end 4HP
  • 48/56Y wet end assembly
  • Aqua-Flo FMXP3 wet end

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

Technical specifications

Horsepower
4.0 HP
Frame size
48/56Y frame

Common symptoms this part fixes

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

  • Weak or no jet pressure
  • Pump motor running but little to no water flow
  • Wet end leaking from housing or volute
  • Impeller damaged or seized causing loss of circulation
  • Cracked or deteriorated pump housing

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

Before you buy — quick checklist

  • Confirm your existing pump is an Aqua-Flo FMXP3 series on a 48/56Y frame
  • Verify both suction and discharge ports are 2-1/2" MBT — do not estimate, measure the threads
  • Check the HP rating on your existing pump motor label to confirm 4.0HP compatibility
  • Inspect whether you need only the wet end or the full pump assembly — the motor is sold separately
  • Note the discharge orientation of your current wet end before ordering to ensure it matches your plumbing layout

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 housing assembly
  • Impeller
  • Seal assembly
  • Face plate/volute

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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