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48Y Frame 1-1/2" MBT x 1-1/2" MBT Wet End 310-1120 0.75HP - Bubbles Supply

48Y Frame 1-1/2" MBT x 1-1/2" MBT Wet End 310-1120

Part #: 310-1120

$218.86
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About this wet end

This Waterway 48Y Frame wet end (310-1120) is designed for Waterway E-Series spa pumps operating at 3/4 HP. The wet end features dual 1-1/2" MBT connections and is built to OEM specifications for reliable performance in your spa's circulation system. This genuine Waterway component ensures proper water flow and maintains the hydraulic efficiency your spa was designed for.

At Bubbles Supply, we guarantee this wet end will be an exact fit for your compatible 48Y frame pump, backed by our comprehensive 1-year warranty. Every order ships the same day for minimal downtime, getting your spa back to optimal operation quickly. Before installation, verify your pump's frame size and horsepower rating match this 3/4 HP, 48Y configuration to ensure proper fitment and performance.

Exact part number

310-1120

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 3/4 HP wet end
  • 310-1120 pump housing
  • 48Y wet end
  • Waterway E-Series wet end

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

Technical specifications

Horsepower
0.75 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:

  • Cracked or leaking pump housing
  • Weak or no water flow from jets
  • Visible fracture or damage to volute
  • Pump running but not moving water
  • Impeller cavitating due to damaged housing seal surfaces

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

Before you buy — quick checklist

  • Confirm your existing pump motor is a 48Y frame — check the motor label for frame designation
  • Verify your pump is rated at 3/4 HP — do not assume based on spa size alone
  • Confirm your plumbing is 1-1/2" MBT (Male Buttress Thread) on both suction and discharge sides
  • Inspect your existing motor shaft for damage before reusing it with this new wet end — a worn shaft will cause premature seal failure
  • Check that the motor on your pump is an E-Series Waterway — this wet end is not universal across all 48Y motors

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
  • Mechanical seal
  • Wear ring

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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