Who it’s for: Licensed HVAC/R techs and plumbers who want a fair dinkum 1/2″ expander head for the Imperial 175EX XpandR™ tool. Create uniform, leak-free sockets without extra fittings — quicker brazes, no dramas, and fewer call-backs.

Function & benefits

This 1/2″ replacement head (MPN: 175EX08) drops onto your 175EX to expand tube ends for brazing or soldering — cutting out couplings, speeding installs, and keeping pressure drops down.

• ✅ Self-centring, hardened jaw segments — accurate, round sockets that braze cleanly and hold pressure.
• ✅ Uniform capillary gap — better capillary action and joint quality; fewer “come back and fix it” jobs.
• ✅ Reduced fittings & joints — save time on every run and carry fewer parts on the truck.
• ✅ Built for site work — high-alloy, long-life segments that cop daily use, too easy.

Where it can be used

Made for HVAC/R and plumbing swaging on 1/2″ tube:

• ✅ Soft copper straight from the coil (or anneal the end of hard-drawn copper before expanding).
• ✅ Soft thin-wall steel & stainless within Imperial’s application limits (check wall thickness and job spec).
• ✅ Ideal for refrigeration, air conditioning, and general plumbing where you want strong, leak-free brazed joints.

Pro Tip

Deburr the I.D., lightly chamfer the O.D., and wipe clean. If the line is hard-drawn, torch-anneal just the last 25–40 mm to a dull red and let it cool before expanding. You’ll get a smoother socket, tighter capillary, and prettier fillets.

Why this head matters

On a Gold Coast split change-out, we swapped a coupling for a quick expand on 1/2″ suction. Two heats, rod flowed like butter, and pressures were spot-on — job signed off before smoko. It’s a small upgrade that makes a bloody good difference across the week.

Need other sizes? See our Expander Heads collection for 3/8″ through 1-5/8″ options.

What’s included & specifications

• ✅ Includes: 1 × Imperial 1/2″ expander head (175EX08)
• ✅ Compatible with: Imperial 175EX XpandR™ manual expander
• ✅ Jaw segments: High-alloy, hardened steel; self-centring design
• ✅ Typical use: Form swage/socket for brazed or soldered joints on approved tubing
• ✅ Warranty: Manufacturer’s Limited Lifetime Warranty (workmanship/materials)

Warranty & Returns

Covered by Imperial’s Limited Lifetime Warranty against defects in materials/workmanship. See our site Shipping & Returns for store policy details.

FAQs

Does this head fit the 175EX kit I already have?

Yes — it’s the OEM 1/2″ head for the 175EX XpandR™.

Can I expand hard-drawn copper?

Yes, but anneal the tube end first so it swages smoothly and stays round.

Is stainless OK?

Only soft, thin-wall stainless within Imperial’s application limits. Check wall thickness and follow site spec.

What else should I grab?

Keep sizes on hand and a deburr tool. If you need the full swaging set, the 175EX kit is the go.

Related products

• Imperial 175EX XpandR™ Kit — Handy when you want all five heads in one case.
• Expander Heads (All Sizes) — Keep 3/8″ to 1-5/8″ covered so every site visit is sorted.
• Imperial Tools Collection — Match with flaring bars, cutters and deburrers.
• Blog: Choosing Expanders — Quick read on when expanding beats using fittings.