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Pump Split Nut 0121109020 - Bubbles Supply

Pump Split Nut 0121109020

Part #: 0121109020

$2.81
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 Magic Plastics Pump Split Nut (0121109020) is a genuine OEM 2-inch union fitting designed for spa and hot tub plumbing systems. This small flange split nut with screws creates secure, watertight connections in your spa's pump assembly, ensuring reliable operation and preventing costly leaks.

Built to Magic Plastics' exacting standards, this split nut delivers the exact fit your spa system demands. At Bubbles Supply, we guarantee precise fitment and back every part with our comprehensive 1-year warranty. With same-day shipping available, you can get your spa running smoothly without delay. The included screws and small flange design make this an essential replacement component for maintaining your spa's plumbing integrity. Always verify thread size and flange dimensions match your existing pump union before installation to ensure proper sealing.

Exact part number

0121109020

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 2-inch split nut
  • pump union split nut
  • split flange nut
  • union locking nut

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:

  • Union leaking at pump inlet or outlet
  • Water dripping from pump plumbing connection
  • Cracked or broken split nut causing slow leak
  • Union won't tighten or hold seal
  • Visible fracture or missing pieces on existing split nut

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

Before you buy — quick checklist

  • Confirm your existing union is a 2-inch small flange style — measure the OD of the union body before ordering
  • Inspect the mating union tailpiece and o-ring — a leaking union often means the o-ring also needs replacement
  • Check that the split nut threads match your existing union body — cross-threading is a common installation error
  • Verify the screws included are the correct size for your union style — some unions use metric fasteners
  • If the union body itself is cracked or deformed, you likely need the full union assembly, not just the split nut

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

  • Split nut (2-piece halves)
  • Retaining screws

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

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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