milwaukeetool

If you’ve ever installed PEX plumbing — especially Uponor or ProPEX systems — you know that the expansion tool is the heart of the operation. Manual expanders work but wear out your hands fast, while cordless expanders offer speed and consistency. The M12 FUEL ProPEX expansion tool from Milwaukee is a game-changer in the PEX plumbing tool category, but is it worth the investment? In this comprehensive review, we’ll break down performance, battery life, build quality, and how it compares to other expansion tools on the market.

What Is the M12 FUEL ProPEX Expansion Tool?

The M12 FUEL ProPEX expansion tool (model 2673-20) is a cordless, handheld expander designed specifically for PEX-A (Uponor/ProPEX) pipe and fittings. It uses Milwaukee’s M12 platform, meaning it runs on the same compact 12-volt batteries as many other tools in the lineup. The tool automatically expands the PEX ring, allowing you to make leak-free connections in seconds — without manual cranking or air hoses.

Key Features and Specs

• Power Source: M12 REDLITHIUM battery (sold separately or in kits)
• Expansion Range: 1/2 in. to 1 in. PEX-A
• Expansion Speed: Approximately 2 seconds per expansion
• Motor: Brushless FUEL motor for efficiency and durability
• Weight: Around 5.5 lbs (with battery)
• LED Light: Integrated LED for illuminating dark workspaces

The tool also features a quick-change collet system for swapping expansion heads, and a built-in battery gauge so you always know how much charge remains.

Performance: Speed and Consistency

In our testing, the M12 ProPEX expander delivered consistent expansions every time. The brushless motor pulls the expansion head back smoothly, and the automatic cycle ensures the PEX ring is expanded to the exact diameter needed. Compared to manual expanders, this tool is significantly faster — you can make a connection in under 5 seconds from start to finish. That speed translates directly to labor savings on large plumbing jobs, such as radiant heating systems or whole-house PEX repipes.

One of the biggest advantages of a cordless expansion tool is consistency. Manual expanders can vary depending on the user’s grip and strength, leading to uneven expansions. The M12 FUEL tool eliminates that variable, giving you professional-grade results every time.

Battery Life and Runtime

Using a standard M12 2.0 Ah battery, we got about 60–80 expansions per charge. That’s enough for most residential jobs. For larger projects, a higher-capacity M12 battery (like the 4.0 or 6.0 Ah) can double or triple that count. The tool works with any M12 battery, so if you already own other M12 tools — like the M12 FUEL 12-Volt Lithium-Ion Brushless Cordless Hammer Drill and Impact Driver Combo Kit — you can share batteries across your kit. That’s a major convenience for plumbers who already use the M12 platform.

For maximum runtime on long jobs, consider pairing the expander with the M18 18-Volt 2.0 Ah Lithium-Ion Compact Battery (via an adapter, if compatible). While the M12 battery works well, having extra capacity ensures you won’t be interrupted mid-pipe.

Build Quality and Ergonomics

Milwaukee tools are known for their durability, and the M12 ProPEX expander is no exception. The housing is reinforced with rubber overmold to absorb drops and vibrations. The handle is comfortably shaped, and the tool balances well even with a battery attached. At about 5.5 pounds, it’s light enough to use overhead or in tight crawl spaces without fatigue.

The LED light is a nice touch for working in dark basements or under sinks. The quick-change collet makes swapping expansion heads (for different pipe sizes) fast and tool-free.

Cost vs. Value: Is It Worth It?

The M12 FUEL ProPEX expansion tool retails for around $350–400 for the bare tool, and kits with battery and charger run $450–550. That’s a significant investment, especially for DIYers who might only use it a few times. However, for professional plumbers or serious DIYers who do multiple PEX projects, the tool pays for itself in time saved and reduced frustration.

Manual expanders cost $50–100, but they are slow and physically demanding. Pneumatic expanders are faster but require an air compressor and hose. The cordless M12 expander sits in a sweet spot — fast, portable, and battery-powered. If you’re doing more than a handful of connections, the ergonomic and time benefits justify the cost.

For comparison, the M12 FUEL ProPEX expansion tool competes directly with the DeWalt DCE500 and the Ridgid 36263. In side-by-side tests, the Milwaukee tool is often praised for its smoother operation and better battery life. It’s a top pick among plumbing pros.

Pros and Cons

Pros	Cons
Fast, consistent expansions	High upfront cost
Runs on M12 batteries (shared with other tools)	Only works with PEX-A (not PEX-B/C)
Lightweight and ergonomic	Battery life limited with small packs
Built-in LED for dark areas	Expansion heads sold separately (for 3/4” and 1”)
Durable construction	Not for high-volume industrial use (slower than pneumatic)

Who Should Buy This Tool?

The M12 ProPEX expansion tool is ideal for:

• Professional plumbers who install PEX-A systems daily
• HVAC contractors working on radiant heating and hydronic systems
• Serious DIYers planning a whole-house PEX repipe or large renovation
• Anyone who already owns M12 tools and wants to expand their cordless capabilities

If you’re a casual DIYer doing a single sink or toilet line, a manual expander may be more cost-effective. But if you value your time and want professional results, this tool is a worthy investment.

Maintenance and Accessories

To keep your expander running smoothly, periodically clean the expansion head collet and lubricate it with a light machine oil. Milwaukee offers replacement expansion heads for 1/2 in., 3/4 in., and 1 in. pipes. You can also find kits that include multiple heads and a carrying case.

For cutting PEX pipe cleanly, a quality hole saw is essential. The 6 in. Hole Dozer Bi-Metal Hole Saw with 3/8 in. Arbor and Pilot Bit is a great option for cutting through wood and drywall to run your PEX lines. It’s durable and leaves a clean edge, which helps when feeding pipe through studs.

Final Verdict

The M12 FUEL ProPEX expansion tool is one of the best cordless plumbing tools we’ve tested. It delivers speed, consistency, and ergonomic comfort that manual expanders simply can’t match. While the price is steep, professionals and serious DIYers will find the investment worthwhile — especially if they already use the M12 platform.

If you’re ready to upgrade your PEX plumbing workflow, check out the M12 FUEL 12V Lithium-Ion Cordless Oscillating Multi-Tool (Tool-Only) as a complementary tool for cutting and prepping around pipes. Together, these two tools make a powerful cordless duo for any plumbing job.