πŸš€ New launch promo β€” 10% off orders over $300. Use code LAUNCH10
Not sure which part you need? Upload a photo and we'll find it. β†’
5-3/4" ID x 6" OD O-Ring 256BN70 - Bubbles Supply

5-3/4" ID x 6" OD O-Ring 256BN70

Part #: 256BN70

$4.32
In stock β€” ships today
Qty
πŸ”’ Secure checkout↩️ 30-day returnsβœ… 1-year warranty
Add to B2B order list

Not sure this fits?

Send us a photo of your old part β€” we'll confirm the right replacement before you order.

Upload a Photo

1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this seal/gasket

This Waterway pump volute O-ring delivers the exact seal your spa's Hi-Flo main pump needs to prevent costly leaks and maintain optimal water circulation. Measuring 5-3/4" inner diameter by 6" outer diameter, this OEM replacement part fits Waterway Hi-Flo pump models and restores factory-tight sealing between volute components. The durable nitrile rubber construction withstands spa chemicals and temperature cycling for reliable long-term performance.

At Bubbles Supply, we guarantee this O-ring will fit your pump exactly as specified, backed by our 1-year warranty on all replacement parts. Orders ship same-day when placed before our cutoff, getting your spa back up and running fast. Before installation, clean the volute groove thoroughly and check that both the inner and outer diameter measurements match your original O-ring to ensure proper seating and seal integrity.

Exact part number

256BN70

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 256 O-ring
  • Hi-Flo volute seal
  • pump body O-ring
  • volute O-ring

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

Common symptoms this part fixes

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

  • Water leaking from pump body joint
  • Wet spot or puddle under the pump housing
  • Air entrainment causing low flow or loss of prime
  • Visible seepage between volute and pump housing
  • Spa losing water with no obvious plumbing leak

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

Before you buy β€” quick checklist

  • Measure your existing O-ring β€” confirm 5-3/4" ID and 6" OD before ordering
  • Verify your pump is a Waterway Hi-Flo model (check label on pump housing)
  • Inspect the volute groove for cracking or damage β€” a damaged groove won't seal even with a new O-ring
  • Check whether the leak is at the volute joint specifically, not at a union or fitting

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

Install difficulty: Easy β€” DIY-friendlyTypically 15-30 minutes

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 β†’

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 β€” 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.

πŸ”’ Secure checkout Β· SSL encryptedΒ·πŸ‡ΊπŸ‡ΈπŸ‡¨πŸ‡¦ Serving the US and Canada·↩️ 30-day hassle-free returnsΒ·πŸ“¦ Same-day fulfillment