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Pump Union 400-4060 - Bubbles Supply

Pump Union 400-4060

Part #: 400-4060

$10.89
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 400-4060 pump union is a 1-1/2" female buttress thread to 1-1/2" slip connection fitting designed for Waterway spa pumps. This OEM plumbing component creates a secure, removable connection between your pump and spa plumbing system, allowing for easy pump maintenance and replacement without cutting pipes.

Built to Waterway's exact specifications, this genuine pump union ensures reliable performance and leak-free operation in your spa system. At Bubbles Supply, we guarantee this is the exact fit for your Waterway pump setup, and every order ships the same day with our comprehensive 1-year warranty for complete peace of mind. Remember to hand-tighten the union connection and use appropriate thread sealant on the threaded side for optimal performance.

Exact part number

400-4060

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 1-1/2 inch pump union
  • pump plumbing union
  • pump union fitting
  • union connector

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

Technical specifications

Union size
1-1/2 inch

Plumbing notes

  • Union size: 1-1/2 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:

  • Active leak at pump inlet or outlet connection
  • Union cracked or broken after freeze damage
  • Cross-threaded union that won't seal
  • Weeping connection that won't stop dripping despite re-tightening
  • Union body cracked from over-tightening

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

Before you buy — quick checklist

  • Confirm your existing union is 1-1/2" female buttress thread on one side and 1-1/2" slip on the other — do not assume all Waterway unions share the same size
  • Inspect whether you need one union or a pair — pumps have both an inlet and outlet union
  • Check the slip side of the union against your existing pipe OD before ordering
  • Verify the union nut threads engage smoothly before assuming the body is the failed component — sometimes only the nut needs replacement
  • Confirm this is a Waterway pump; this is an OEM Waterway part and may not match union bodies from other manufacturers

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

Install difficulty: Easy — DIY-friendlyTypically 15-30 minutes

What's in the box

  • Pump union body
  • Union nut
  • O-ring

If your order is missing any items listed above, contact hello@bubblessupply.com within 48 hours of delivery.

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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