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2-3/16" ID x 2-7/8" OD Heater O-Ring 711-4030 - Bubbles Supply

2-3/16" ID x 2-7/8" OD Heater O-Ring 711-4030

Part #: 711-4030

$1.89
In stock — ships today
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this seal/gasket

Genuine Waterway heater o-ring designed to create a watertight seal in spa heating systems. This precision-molded gasket features 2-3/16" inner diameter and 2-7/8" outer diameter dimensions, making it compatible with various Waterway heater assemblies across multiple spa brands. The durable rubber construction withstands high temperatures and chemical exposure typical in hot tub environments.

At Bubbles Supply, we guarantee this OEM Waterway o-ring delivers an exact fit for your heater repair. Every order ships same-day and includes our comprehensive 1-year warranty for complete peace of mind. This genuine replacement part restores proper sealing to prevent water leaks and maintain optimal heater performance. Always verify your existing o-ring dimensions before ordering, and replace both the o-ring and any worn sealing surfaces during heater maintenance for best results.

Exact part number

711-4030

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Also known as / Replaces

This part replaces or is interchangeable with:

  • heater manifold o-ring
  • heater tube o-ring
  • Waterway heater gasket

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 heater assembly
  • Damp or wet area around heater manifold
  • Spa losing water without visible plumbing leak
  • Heater error codes triggered by pressure loss
  • Heater cycling off due to low flow caused by seal bypass

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

Before you buy — quick checklist

  • Measure your existing o-ring — confirm 2-3/16" ID and 2-7/8" OD before ordering
  • Inspect the heater manifold groove and seating surface for scoring or corrosion — a damaged seating surface will cause the new o-ring to fail regardless of fit
  • Identify your heater brand and model to confirm this is the correct Waterway OEM o-ring for your assembly
  • Check whether your spa uses a single o-ring or multiple o-rings in the heater assembly — order extras if multiple seals are present
  • Look for signs of chemical damage or brittleness on other nearby seals while the heater is apart

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

Install difficulty: Easy — DIY-friendlyTypically 15-30 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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