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Heater Adapter Bushing 1125BUSH - Bubbles Supply

Heater Adapter Bushing 1125BUSH

Part #: 1125BUSH

$6.22
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 Pasco 1125BUSH Heater Adapter Bushing is an essential OEM replacement part designed for spa heating systems requiring precise thread connections. This adapter bushing features 1-1/4" male pipe thread (MPT) to 1" female pipe thread (FPT) configuration, making it the go-to solution for connecting heater components with different thread sizes in most residential spa installations.

Engineered to OEM specifications, this genuine Pasco adapter ensures reliable performance and prevents costly leaks at critical connection points. We guarantee an exact fit for your spa's heating system, backed by our comprehensive 1-year warranty and same-day shipping commitment. When installing, ensure proper thread engagement and use appropriate pipe sealant to maintain watertight connections between your heater assembly components.

Exact part number

1125BUSH

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Also known as / Replaces

This part replaces or is interchangeable with:

  • 1-1/4 to 1 inch heater bushing
  • heater bushing
  • MPT to FPT bushing
  • pipe reducer bushing

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

Common symptoms this part fixes

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

  • Water leaking at heater inlet or outlet connection
  • Mismatched thread sizes preventing heater assembly
  • Stripped or damaged bushing causing drip at heater manifold
  • Unable to connect 1-inch FPT component to 1-1/4-inch MPT heater port
  • Thread adapter failure causing pressure loss at heater connection

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

Before you buy — quick checklist

  • Confirm your heater port is 1-1/4 inch MPT — measure the male thread OD before ordering
  • Confirm the component you're connecting is 1 inch FPT
  • Inspect the mating threads on your heater manifold for damage or crossthreading — a new bushing won't seal against damaged threads
  • Verify material compatibility — this bushing must be rated for hot water and spa chemical exposure
  • Have PTFE thread tape or thread sealant rated for hot water on hand before starting the install

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

Install difficulty: Easy — DIY-friendlyTypically 15-30 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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