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48Y Frame 1-1/2" MBT x 1-1/2" MBT Wet End 91040820-000 1.50HP - Bubbles Supply

48Y Frame 1-1/2" MBT x 1-1/2" MBT Wet End 91040820-000

Part #: 91040820-000

$205.25
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About this wet end

This genuine Aqua-Flo by Gecko wet end assembly is designed for 48-frame spa pumps requiring 1-1/2" MBT (male buttress thread) connections on both suction and discharge sides. Built for 1.5HP pump configurations, this OEM replacement part delivers the exact specifications needed to restore proper water circulation in compatible hot tubs and spas. The robust 48Y frame design ensures reliable performance and proper alignment with your existing pump motor.

At Bubbles Supply, we guarantee this wet end will deliver an exact fit for your Aqua-Flo pump system. Every order ships same-day when placed before our cutoff time, and your investment is protected by our comprehensive 1-year warranty. Before installation, confirm your pump's frame size and verify the 1-1/2" MBT thread connections match your plumbing configuration to ensure proper fitment.

Exact part number

91040820-000

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 1.5HP pump wet end
  • 48Y wet end
  • Aqua-Flo wet end
  • pump head
  • volute assembly

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

Technical specifications

Horsepower
1.5 HP
Frame size
48Y
Port type
1-1/2" MBT inlet x 1-1/2" MBT discharge

Plumbing notes

  • Port type: 1-1/2" MBT inlet x 1-1/2" MBT 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:

  • Weak or no water flow despite motor running
  • Pump leaking from the volute or housing
  • Impeller worn, cracked, or broken causing loss of prime
  • Cavitation noise — grinding or rattling from pump head
  • Visible crack or damage to wet end housing
  • Pump fails to prime or repeatedly loses prime

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

Before you buy — quick checklist

  • Confirm your existing motor is a 48Y frame — check the motor label for frame designation
  • Verify both suction and discharge ports are 1-1/2" MBT (male buttress thread) — not all 1.5HP pumps share this port size
  • Confirm your pump motor is mechanically sound before replacing only the wet end — if the motor is seized or burned, you may need a full pump assembly
  • Match the impeller style if reusing your existing impeller — open vs. closed face matters for flow rate
  • Check the existing seal plate and seal condition — replacing the mechanical seal at the same time is strongly recommended
  • Verify this is an Aqua-Flo branded pump — do not assume fitment based on HP or frame size alone

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 (volute)
  • Impeller
  • Seal plate
  • Mechanical shaft seal
  • O-ring(s)

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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