1HP 15/16" SL x 4-3/16" OD Impeller 310-4220

Name: 1HP 15/16" SL x 4-3/16" OD Impeller 310-4220
Brand: Waterway
SKU: 310-4220
Price: 60.36 USD
Availability: InStock

Part #: 310-4220

$60.36

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About this impeller

This genuine Waterway impeller is designed for 1HP Executive spa pumps with 48/56Y motor frames. The precision-molded component features a 15/16" shaft length and 4-3/16" outer diameter, engineered to restore optimal water flow and pressure in your spa's main circulation system.

As an OEM replacement part, this impeller delivers the exact fit and performance your Waterway pump was designed for. When your spa's circulation feels weak or the pump runs louder than usual, a worn impeller is often the culprit. We guarantee exact fitment, ship same-day from our Canadian warehouse, and back every part with a full 1-year warranty. Before installation, verify your pump's horsepower rating and measure the existing impeller's shaft length to ensure proper compatibility with your specific Executive pump model.

Exact part number

310-4220

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

1HP pump impeller
48/56Y impeller
Waterway Executive impeller

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

Technical specifications

Horsepower: 1.0 HP
Frame size: 48/56Y

Common symptoms this part fixes

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

Weak or reduced water flow from jets
Pump runs loud or rattles under load
Pump cavitates or surges erratically
Spa jets have lost noticeable pressure over time
Pump runs but circulation is insufficient to heat water properly

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

Before you buy — quick checklist

Confirm your pump is a Waterway Executive model with a 48 or 56Y frame motor
Verify the horsepower rating on the motor label reads 1.0 HP — do not rely on what the spa manufacturer states
Measure your existing impeller's shaft hole diameter (should be 15/16") and outer diameter (should be 4-3/16") before ordering
Inspect the pump seal and diffuser while the pump is apart — replace them at the same time to avoid a repeat teardown
Check the impeller thread direction before removal — Waterway impellers are typically reverse-threaded

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

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

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