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48Y Frame 1-1/2" MBT x 1-1/2" FPT Wet End 310-7820 1.00HP - Bubbles Supply

48Y Frame 1-1/2" MBT x 1-1/2" FPT Wet End 310-7820

Part #: 310-7820

$90.27
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About this wet end

This genuine Waterway wet end assembly is designed for 48Y frame spa pumps with 1-1/2" MBT inlet and 1-1/2" FPT outlet connections. Built for 1.0 HP Spa-Flo II pump systems, this OEM replacement part delivers the reliable performance your spa demands. The wet end houses the impeller and volute, creating the water flow that powers your spa's circulation and filtration.

At Bubbles Supply, we guarantee this Waterway wet end provides an exact fit for your pump system. Every genuine OEM part ships the same day you order and comes backed by our comprehensive 1-year warranty. Whether you're replacing a cracked housing or upgrading worn components, this wet end restores your pump's original performance and efficiency. Always verify your existing pump's frame size and connection measurements before installation to ensure proper fitment.

Exact part number

310-7820

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Also known as / Replaces

This part replaces or is interchangeable with:

  • 48Y wet end assembly
  • pump housing assembly
  • pump volute assembly
  • Spa-Flo II wet end

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

Technical specifications

Horsepower
1.0 HP
Frame size
48Y
Port type
1-1/2" MBT inlet, 1-1/2" FPT outlet

Plumbing notes

  • Port type: 1-1/2" MBT inlet, 1-1/2" FPT 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:

  • Pump leaking from volute or housing
  • Cracked or broken pump body
  • Low water flow or weak jet pressure
  • Visible housing damage from freeze or impact
  • Pump runs but water output is significantly reduced

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

Before you buy — quick checklist

  • Confirm your existing pump is a 48Y frame — check the label on the motor end bell
  • Verify inlet is 1-1/2" MBT (male barbed thread) and outlet is 1-1/2" FPT (female pipe thread)
  • Confirm pump is rated 1.0 HP — do not use this wet end on higher HP motors
  • Check whether your impeller needs replacement at the same time — worn impellers reduce performance even with a new wet end
  • Inspect the shaft seal before reassembly — it is commonly replaced alongside the wet end

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

If your order is missing any items listed above, contact hello@bubblessupply.com within 48 hours of delivery.

Warranty

1 year 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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