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2" ID x 2-1/4" OD O-Ring 30-229EP70 - Bubbles Supply

2" ID x 2-1/4" OD O-Ring 30-229EP70

Part #: 30-229EP70

$1.13
In stock — ships today
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🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
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Fits these systems

Balboa

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

Before you buy — quick checklist

  • Measure your existing O-ring's inner and outer diameter before ordering — 2" ID x 2-1/4" OD must match exactly
  • Confirm your plumbing uses a HydroAir-style union that accepts this O-ring profile
  • Inspect the union groove for cracking, warping, or damage — a bad groove will defeat even a new O-ring
  • Check that the O-ring cross-section (wall thickness) matches your union's groove depth
  • If the union collar is cracked or won't fully tighten, replace the full union assembly rather than just the O-ring

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

Exact part number

30-229EP70

Save this for ordering or warranty claims

Common symptoms this part fixes

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

  • Dripping or weeping at a pipe union connection
  • Steady leak at union joint under pressure
  • Leak that worsens when pump is running
  • Visible O-ring cracking, flattening, or extrusion from union groove
  • Leak returns shortly after tightening union collar

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

About this seal/gasket

This 2" ID x 2-1/4" OD O-Ring (part #30-229EP70) is a genuine Balboa replacement seal designed for union connections in HydroAir spa plumbing systems. This precision-molded EP70 compound O-ring creates a watertight seal between pipe unions, preventing leaks in your spa's circulation system.

Built to Balboa's exacting OEM specifications, this O-ring delivers the exact fit and durability your spa demands. The 2" inner diameter and 2-1/4" outer diameter ensure proper compression and sealing performance. At Bubbles Supply, we guarantee this is the exact replacement for your original part, and we'll ship it the same day with our standard 1-year warranty. When installing, ensure the union groove is clean and free of old sealant, and apply a thin layer of silicone lubricant for easier assembly and optimal seal performance.

Also known as / Replaces

This part replaces or is interchangeable with:

  • 2-inch union O-ring
  • EP70 O-ring

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

Install difficulty: Easy — DIY-friendlyTypically 10–20 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.

AI Fitment Assistant

Tell us your spa model and we will confirm this part fits before you buy.

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