Today, we’re diving into the DeWalt 20V MAX 1” Brushed PEX Expander, model DCE400. DeWalt claims it’s the fastest 3/8″-1″ PEX-A expander on the market. Let’s break down its specs, features, and how it stacks up against the competition.
Specifications
- Capacity: 3/8″ to 1″ PEX-A
- Weight: 4 lbs (without battery or expansion head)
- Power Source: 20V MAX battery
Key Features
- Super Bright LED Work Light: Illuminates your workspace with impressive clarity.
- Reversible/Removable Belt Hook: Adds convenience and flexibility for storage or hands-free use.
- Rubber Overmold Grip: Enhances comfort during extended use.
- Cross-Compatible: Works with Milwaukee and Uponor expansion heads.
The DCE400B (bare tool) package includes a carrying case, 1/2″, 3/4″, and 1″ expansion heads, and a tube of expansion cone grease. Meanwhile, the DCE400D1 kit—possibly discontinued—came with only the 1/2″ and 3/4″ heads. Its replacement, the DCE400D2, offers everything in the DCE400B plus two 2Ah batteries and a 4A charger.
DeWalt DCE400 vs. Milwaukee 2532
Both the DeWalt DCE400 and Milwaukee 2532 tout lightning-fast expansion speeds for 3/8″-1″ PEX-A, so we put them to the test. Using 3/4″ PEX-A, we ran three sets of ten expansions each. The results? The Milwaukee edged out slightly in speed, but the DeWalt opened the pipe wider by about 3/32″. In practical terms, they’re neck-and-neck.
Here’s an interesting observation: faster expansions seem to lead to faster contractions. If true, the DeWalt’s slightly wider expansion could buy you a couple extra seconds to insert a fitting—crucial if you’re following best practices. The manual advises wiping excess expansion cone grease from the tube before fitting insertion (though let’s be honest, who does that?). Those extra seconds could make a difference.
Both tools give you a tight 5-7 second window to insert a fitting, even with a few extra pumps. The manuals recommend 11-12 pumps for 3/4″ PEX, but also says to stop when the tube hits the cone base. In warm weather, that took just six pumps—so adjust accordingly.
What’s Up with the Light?
The DeWalt’s LED work light is insanely bright. It holds peak brightness for 2.5 minutes before dimming for another 30 seconds. By comparison, the Milwaukee’s light—bright but just shy of overwhelming—shuts off after 11 seconds. Neither tool’s manual offers brightness adjustments, so what you see is what you get.
Build Quality and Bottom Line
Beyond the dazzling light, the DeWalt DCE400 feels sturdier than the Milwaukee 2532. I’ve used two brushed and one brushless Milwaukee expander, and all had noticeable play between the head and body. The DeWalt? Rock solid—no play whatsoever.
So, there you have it. If you’re in the market for a reliable PEX-A expander, the DeWalt DCE400 delivers speed, versatility, and durability. Pair it with your preferred 20V battery, and you’re good to go. Hope it works out for you!
