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56Y Frame 2" MBT x 2" MBT Wet End 91041940-000 4.00HP - Bubbles Supply

56Y Frame 2" MBT x 2" MBT Wet End 91041940-000

Part #: 91041940-000

$233.09
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About this wet end

This Aqua-Flo by Gecko 56Y frame wet end delivers reliable 4.0HP performance for spa main pump systems requiring 2" MBT threaded connections. Engineered for the FMXP2e pump series, this OEM wet end maintains optimal water circulation and pressure in your spa or hot tub system.

Built to exact factory specifications, this wet end ensures seamless integration with your existing 56-frame pump motor. At Bubbles Supply, we guarantee an exact fit with same-day shipping and back every wet end with our comprehensive 1-year warranty. The dual 2" male buttress thread design provides secure, leak-free connections to your spa's plumbing system. Verify your current wet end's frame size, horsepower rating, and thread specifications before ordering to ensure proper compatibility with your spa's pump configuration.

Exact part number

91041940-000

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 4HP 56-frame wet end
  • 56Y wet end
  • Aqua-Flo 2" MBT wet end
  • FMXP2e wet end

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

Technical specifications

Horsepower
4.0 HP
Frame size
56Y frame

Common symptoms this part fixes

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

  • Wet end housing cracked or leaking at pump body
  • Impeller worn or broken causing low flow
  • Pump cavitating or running noisy under load
  • Visible damage to volute or diffuser
  • Weak jet pressure despite motor running normally
  • Leaking from MBT threaded connection at pump inlet or outlet

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

Before you buy — quick checklist

  • Confirm your existing motor is a 56Y frame — check the motor nameplate or measure the mounting face
  • Verify your pump is the FMXP2e series before ordering this wet end
  • Confirm plumbing connections are 2" Male Buttress Thread (MBT) — do not confuse with NPT or slip fittings
  • Match the horsepower rating on your existing wet end label to 4.0 HP
  • Inspect the motor shaft before reassembly — a worn or corroded shaft can damage the new impeller
  • Turn off all power to the spa at the breaker before beginning any work

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

  • 56Y frame wet end assembly
  • Impeller (pre-installed or included)
  • Seal assembly

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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