🚀 New launch promo — 10% off orders over $300. Use code LAUNCH10
Bubbles Supply
Not sure which part you need? Upload a photo and we'll find it. →
2-11/16" ID x 3-5/16" OD Heater O-Ring 44-02340 - Bubbles Supply

2-11/16" ID x 3-5/16" OD Heater O-Ring 44-02340

Part #: 44-02340

$8.37
In stock — ships today
Qty
🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
Add to B2B order list

Not sure this fits?

Send us a photo of your old part — 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 HydroQuip heater O-ring creates a watertight seal for spa heating systems, preventing costly leaks and maintaining efficient operation. Measuring 2-11/16" inner diameter by 3-5/16" outer diameter with 1/4" thickness, this OEM replacement part fits HydroQuip heater assemblies in residential and commercial spas. The precision-molded rubber gasket withstands high temperatures and chlorinated water while maintaining its sealing properties over time.

At Bubbles Supply, we guarantee this O-ring will fit your HydroQuip heater exactly as designed. Every order ships same-day from our Canadian warehouse and includes our comprehensive 1-year warranty for complete peace of mind. Whether you're addressing existing leaks or performing preventive maintenance, this genuine HydroQuip part ensures reliable performance. Always verify your heater's exact dimensions before ordering, and replace both the O-ring and gasket together for optimal sealing.

Exact part number

44-02340

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • heater element o-ring
  • heater gasket
  • heater o-ring
  • heater tube 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 heater tube or heater housing
  • Damp or wet equipment bay with no obvious source
  • Heater losing prime due to air ingestion at seal
  • Visible mineral deposits or corrosion around heater end cap
  • Spa losing water level without a plumbing failure upstream

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

Before you buy — quick checklist

  • Measure your existing o-ring carefully — ID should be 2-11/16" and OD 3-5/16" with 1/4" cross-section before ordering
  • Confirm your heater assembly is a HydroQuip unit — check the heater label or control system brand
  • Inspect the o-ring groove for cracks, corrosion, or debris that could prevent a proper seal even with a new o-ring
  • Replace both the o-ring and any companion gasket at the same time to avoid a second teardown shortly after
  • Have the spa fully powered down and water level dropped below the heater before starting work

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.

🔒 Secure checkout · SSL encrypted·🇺🇸🇨🇦 Serving the US and Canada·↩️ 30-day hassle-free returns·📦 Same-day fulfillment