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Heater Half Union 0611-20 - Bubbles Supply

Heater Half Union 0611-20

Part #: 0611-20

$6.87
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 Heater Half Union 0611-20 is a precision-engineered replacement union designed for spa heaters requiring a 2" slip to 2" male buttress thread connection. This essential heater component features a complete assembly including split nut and O-ring, ensuring a watertight seal between your heater and plumbing system. Built to Magic Plastics' exacting OEM standards, this union fits various spa brands that use this specific thread configuration.

At Bubbles Supply, we guarantee this heater union will deliver an exact fit for your spa's heating system. Your replacement ships the same day when ordered before our cutoff, backed by our comprehensive 1-year warranty for complete peace of mind. Before installation, verify your existing union's thread specifications match the 2" slip x 2" MBT configuration to ensure proper fitment and optimal heater performance.

Exact part number

0611-20

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Also known as / Replaces

This part replaces or is interchangeable with:

  • 2 inch heater union
  • buttress thread union
  • half union
  • heater union
  • spa heater union

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

Technical specifications

Union size
2 inch slip x 2 inch male buttress thread (MBT)

Plumbing notes

  • Union size: 2 inch slip x 2 inch male buttress thread (MBT)

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:

  • Heater union leaking at connection point
  • Water dripping from heater plumbing fittings
  • Cracked or broken union body
  • Stripped or damaged buttress threads on existing union
  • O-ring failure causing slow drip at heater inlet or outlet

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

Before you buy — quick checklist

  • Confirm your existing union is 2" slip x 2" MBT — measure or check the old part number before ordering
  • Inspect both the nut and the union body — if threads are stripped on the heater manifold itself, a union swap alone won't fix the leak
  • Verify the union side you need — most heater assemblies use two half unions (inlet and outlet); order both if both are damaged
  • Check that your heater manifold accepts a slip fitting on the plumbing side, not a threaded or barb connection
  • This union ships with a split nut and O-ring — confirm your existing split nut is also damaged before replacing the full assembly

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

Install difficulty: Medium — Some experience neededTypically 30–60 minutes

What's in the box

  • Half union body (2" slip x 2" MBT)
  • Split nut
  • O-ring

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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