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48Y Frame 1-1/2" MBT x 1-1/2" MBT Wet End 310-1140 1.50HP - Bubbles Supply

48Y Frame 1-1/2" MBT x 1-1/2" MBT Wet End 310-1140

Part #: 310-1140

$218.86
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About this wet end

This Waterway 48Y frame wet end assembly is designed for 1.5HP spa pumps using 1-1/2" MBT (male buttress thread) connections on both inlet and outlet ports. Part of Waterway's reliable E-Series lineup, this OEM wet end delivers the precise hydraulic performance your spa system requires for optimal water circulation and filtration.

Built to Waterway's exacting standards, this wet end ensures reliable operation and long service life. At Bubbles Supply, we guarantee this is the exact fit for your pump replacement needs, backed by our comprehensive 1-year warranty and same-day shipping on in-stock items. Before installation, verify your pump's frame size matches the 48Y specification and confirm the 1-1/2" MBT thread connections align with your existing plumbing to ensure proper fit and performance.

Exact part number

310-1140

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 1.5HP wet end assembly
  • 48Y wet end
  • E-Series wet end
  • Waterway wet end

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 outlet

Plumbing notes

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

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:

  • Low or no water flow from jets
  • Pump leaking from the volute or impeller housing
  • Impeller worn, cracked, or clogged causing poor circulation
  • Wet end cracked or damaged from freeze or impact
  • Excessive noise or cavitation from a damaged impeller
  • Spa not reaching set temperature due to poor flow through heater

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

Before you buy — quick checklist

  • Confirm your motor frame size is 48Y — check the motor label directly, not just the old wet end
  • Verify both inlet and outlet plumbing connections are 1-1/2" MBT (male buttress thread) before ordering
  • Confirm your motor shaft diameter matches the wet end impeller bore — do not assume compatibility across HP ratings
  • Inspect the motor itself before replacing only the wet end — if the motor bearings are seized or the motor is burned out, you may need the full pump assembly
  • Check whether your existing wet end uses a diffuser or slinger style impeller and confirm this replacement matches
  • Note the existing pump's part number or model number from the motor label to cross-reference fitment

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 (volute and impeller)
  • Wear ring
  • Seal assembly
  • Face gasket or o-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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