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Tailpiece Union 417-5040 - Bubbles Supply

Tailpiece Union 417-5040

Part #: 417-5040

$6.71
In stock — ships today
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this union/fitting

The Waterway Tailpiece Union 417-5040 is an essential plumbing component designed for 2-inch spa plumbing systems. This OEM union fitting features 2" male buttress threads (MBT) on one end and 2" slip connection on the other, providing a reliable junction point for spa circulation systems without requiring an O-ring groove design.

Built to Waterway's exacting standards, this tailpiece union ensures leak-free connections in your spa's plumbing network. At Bubbles Supply, we guarantee this is the exact fit replacement part your spa needs, backed by our 1-year warranty and same-day shipping commitment. The union design allows for easy disconnection during maintenance while maintaining system integrity during operation. Verify your existing fitting measurements and thread type before installation to ensure proper fit in your spa's plumbing configuration.

Exact part number

417-5040

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 2-inch buttress thread tailpiece
  • no-groove tailpiece union
  • slip x MBT union
  • Tailpiece union

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

Technical specifications

Union size
2 inch

Plumbing notes

  • Union size: 2 inch

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:

  • Slow drip or steady leak at pump union connection
  • Cracked or broken tailpiece union body
  • Cross-threaded union causing persistent leak
  • Union won't seal even after tightening
  • Visible stress fractures or UV damage on existing tailpiece

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

Before you buy — quick checklist

  • Confirm your existing tailpiece uses 2-inch male buttress threads (MBT) — not NPT or standard threads
  • Verify the mating pump port or manifold connection is 2-inch slip (not threaded)
  • Confirm your existing tailpiece has NO O-ring groove — this is a no-groove design
  • Check whether you also need the union nut and/or body half — this is the tailpiece only
  • Measure your existing fitting outside diameter and thread pitch before ordering if unsure

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

Install difficulty: Medium — Some experience neededTypically 30-60 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 →

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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