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1.5HP 3-1/4" SL x 4" OD Impeller 05-3864-04 1.50HP - Bubbles Supply

1.5HP 3-1/4" SL x 4" OD Impeller 05-3864-04

Part #: 05-3864-04

$71.55
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About this impeller

This genuine OEM impeller delivers reliable water circulation for Jacuzzi J-Series, JCM-Series, and K-Series spas. Engineered for 1.5 horsepower pumps, this precision-manufactured component features a 3-1/4" suction length and 4" outer diameter design that restores optimal flow rates and pressure in your spa's circulation system.

Our exact fit guarantee ensures this Jacuzzi impeller (part #05-3864-04) meets factory specifications for seamless compatibility. Ships same-day from our Canadian warehouse and includes a full 1-year warranty for complete peace of mind. When replacing your impeller, always verify the horsepower rating matches your pump motor and inspect the impeller housing for debris or wear before installation.

Exact part number

05-3864-04

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Also known as / Replaces

This part replaces or is interchangeable with:

  • J-series impeller
  • Jacuzzi pump impeller
  • JCM-series impeller
  • K-series impeller

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

Technical specifications

Horsepower
1.5 HP

Common symptoms this part fixes

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

  • Weak or low water flow from jets
  • Pump runs but jets have little to no pressure
  • Visible impeller damage, cracking, or erosion
  • Loud grinding or rattling noise from pump housing
  • Poor circulation causing water chemistry imbalance

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

Before you buy — quick checklist

  • Confirm your pump motor is rated at 1.5 HP — check the motor label directly
  • Verify the suction length on your existing impeller measures 3-1/4" before ordering
  • Confirm the outer diameter of your current impeller is 4"
  • Inspect the impeller housing (volute) for cracks or wear — replacing the impeller won't fix a damaged housing
  • This is an OEM Jacuzzi part — confirm your pump is a genuine Jacuzzi J-Series, JCM-Series, or K-Series unit

Reading the checklist now prevents 90% of returns. Worth the 60 seconds.

Install difficulty: Medium — Some experience neededTypically 45-90 minutes

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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