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Union Adapter 415-6010 - Bubbles Supply

Union Adapter 415-6010

Part #: 415-6010

$6.67
In stock — ships today
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🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this union/fitting

The Waterway Union Adapter 415-6010 is a premium plumbing connector designed for spa pump installations requiring a 2" female buttress thread to 2-1/2" male buttress thread connection. This OEM-quality adapter ensures secure, leak-free transitions between different pipe sizes in your spa's circulation system, making it essential for pump replacements or plumbing modifications on Waterway-equipped spas.

Engineered to Waterway's exacting standards, this union adapter delivers the exact fit you need for reliable performance. We guarantee perfect compatibility with your existing plumbing setup, and every adapter ships the same day with our comprehensive 1-year warranty for complete peace of mind. Professional installation is recommended to ensure proper thread engagement and optimal seal integrity—always verify thread specifications match your spa's requirements before installation.

Exact part number

415-6010

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 2-inch to 2.5-inch union adapter
  • buttress thread adapter
  • pump union adapter
  • union adapter

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

Technical specifications

Union size
2 inch female buttress thread to 2-1/2 inch male buttress thread

Plumbing notes

  • Union size: 2 inch female buttress thread to 2-1/2 inch male buttress thread

Need help measuring? Email hello@bubblessupply.com with a photo of your existing plumbing.

Common symptoms this part fixes

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

  • Leaking at pump union connection
  • Cracked or broken union adapter
  • Stripped buttress threads causing drips
  • Inability to seat union properly during pump replacement
  • Water loss at plumbing transition point

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

Before you buy — quick checklist

  • Confirm your existing union uses buttress threads — not standard NPT or acme threads
  • Verify the female side is 2 inch and the male side is 2-1/2 inch before ordering
  • Inspect the mating union nut and tailpiece for damage — adapters alone won't fix a worn nut or cracked tailpiece
  • Check whether your spa uses Waterway-pattern buttress threads, as not all spa brands use the same thread profile
  • Have the pump wet end model number on hand in case you need to cross-reference fitment

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

Install difficulty: Medium — Some experience neededTypically 20-45 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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