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DEWALT

DEWALT DCE400B 20V MAX* 1" PEX Expander Tool (Tool Only)

  • Based on 1,107 reviews
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Availability: Only 3 left in stock, order soon!
Fulfilled by Amazon
Arrives Wednesday, Dec 24
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Features

  • The pex tool expands 3/8-inch - 1-inch Pex Type-A tubing
  • The pex expander tool has an automatic rotating head action for even expansion
  • The pex expansion tool comes with full trigger actuation for use in tight spaces
  • Bright LED work light to help illuminate dark areas
  • Dual-sided hang and belt hooks for convenient storage
  • Rubber overmold for comfortable, ergonomic grip
  • Uses DEWALT PEX Heads. Compatible with Milwaukee and Uponor Heads. (Milwaukee is a registered trademark of Milwaukee Electric Tool Corp. Uponor is a registered trademark of Uponor Oyj.)

Description

Expand PEX Type-A tubing from 3/8-inch to 1-inch with the 20V MAX Cordless 1inch PEX Expander, the fastest PEX Expander on the market. It's proudly made in the USA with global materials. An automatic rotating head helps to ensure even expansion. The bright onboard LED work light and full trigger actuation make it an excellent tool in dimly lit, tight spaces. Carry this tool conveniently around the jobsite with a dual-sided hang hook and belt hook. Rubber overmold on the handle provides an ergonomic grip to keep you comfortable all day. This DEWALT pex expander tool uses DEWALT PEX Heads, and it is compatible with leading competitive PEX heads.

Manufacturer: ‎DEWALT


Part Number: ‎DCE400B


Item Weight: ‎4 pounds


Product Dimensions: ‎15 x 4 x 10 inches


Item model number: ‎DCE400B


Size: ‎One Size


Color: ‎Multi


Style: ‎Classic


Finish: ‎Brushed


Material: ‎Blend


Pattern: ‎Solid


Shape: ‎Rectangular


Power Source: ‎Battery Powered


Voltage: ‎20 Volts


Item Package Quantity: ‎1


Measurement System: ‎Metric


Grit Rating: ‎36


Included Components: ‎(1) DCE400 PEX Expander, PEX Expander Grease, Kit Box


Batteries Included?: ‎No


Batteries Required?: ‎Yes


Warranty Description: ‎3 year limited warranty


Date First Available: August 24, 2017


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Dec 24

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Lifesaver - very easy
Review Image by Shannon Shannon
Soooooo much easier and faster than a manual expansion tool! Did a small bath and kitchen - manual tool would have been a bear and more difficult to get in tighter spots. I did one 3/4” expansion manually and said no way - it is very rough in the shoulders (I lift heavy I the gym 4 days a week)
Reviewed in the United States on November 7, 2025 by Shannon Shannon
    • Price is right
Works like a champ love it…
Reviewed in the United States on October 8, 2025 by DOT2431
    • GREAT
For PEX A and what a wonderful time saving tool
Reviewed in the United States on September 13, 2025 by Joseph M. Swanson
    • What a great tool, PEX-a all the way.
Review Image by Clin Clin
The media could not be loaded. I have a Dewalt battery, so getting this over the Milwaukee version was an easy choice. I can’t talk enough about how easy this has made plumbing. It gets almost anywhere a crimper tool can get and some new places; you don’t have to pull apart handles to work the tool. I replumbed half of a house using it and the only thing that leaked was an NPT connection that tied into old work. I’ll probably use a Sharkbite next time for the old work. The kit includes three heads, 1/2, 3/4, 1 inch. The video I included with this review shows the 3/4 head. They screw on easy enough. You should apply the included grease when changing fittings. The trigger is huge and easy to use. The case is for-purpose and nice to have. This isn’t like a hammer or screwdriver; unless you plumb often you’ll want something for longer storage between use. The only two things that I could complain about with this type of PEX (a or expansion) is the availability of fittings in local stores (only Lowes seems to carry them), and trying to find a place to put the tool after you’ve expanded. The belt clip helps with that, but it’s heavy. It is best to plan a location to set the tool. ... show more
Reviewed in the United States on July 14, 2023 by Clin Clin
    • Do yourself a favor
I was new to PEX and figured I only needed a manual expander to do some 16 or so 1 inch (yes... One Inch) connections. I was soooo wrong. The magnificent pain of using a $120 tool was nearly debilitating! I had to replan and redo a few connections a month later and I finally broke down and bought this DeWalt Power Expander, it's so easy to use. I just hold the trigger in until expansion is done then shove in a fitting and ALL DONE! Though the description and pics didn't show it the tool did come with all 3 heads that handle the range of 3/8 to 1 inch. ... show more
Reviewed in the United States on November 29, 2024 by AllTold
    • The only tool for PEX-A expansion
This tool is awesome. It works great and is fast. The tool comes with expansion heads for 1/2, 3/4, and 1 inch pex fittings. This kit has no battery or charger and since there were Dewalt batteries in my shop it made sense to get the bare tool. Plumbed an entire utility room with a pex manifold only took about 2 hours and would have been an all day job in copper. The hand operated tool is good for a here and there but not as good for 50 connections on a full re-plumbing job and this power expansion tool makes this job seem way too easy. Thats a good thing. Be sure to keep the cone portion of the tool clean and lubed with the special lubricant which comes in the tube. Remove the expansion head and clean the inside of the expansion head and the cone and apply lube. If you use too much lubricant then it will seep through the expansion head and get inside the pex tubing which does not seem to be an issue. Just wipe off the expansion head of the excess and keep working. Too little lubricant would shorten the life of the expansion head. It also has a hook that you can mount on either side and the head comes with a hook already. The hook on the head seemed a bit unhandy to use and preferred to use the hook mounted at the battery end of the tool and it made for a more natural grip when reaching for the tool when hung on your tool belt. Milwaukee makes a tool and seems like the head of the tools are identical. One may directly compare the two and for my use it made more sense to maintain battery compatibility. ... show more
Reviewed in the United States on February 11, 2020 by Ron H
    • Convenient, Modern Way to Plumb
I’ve been happy with this tool although, I haven’t had cause to use the 1” expander. Mainly ³⁄₄” around my water heater. Amazingly quick and problem free compared to soldering. But, you have to do some soldering to get started with an adapter. I like that PEX-A is full flow and that the piping is cheap. I probably don’t do enough plumbing to justify the cost of this tool but it is pretty cool and I’ll gradually get some use out of it. ... show more
Reviewed in the United States on December 28, 2023 by Glenn R. Howes
    • Great tool
I’ve been using pex b for a while now and decided to go to pex a. This tool has made joining pex so much easier. I look for places to use this now. I want to change out all of my plumbing to use pex a now. Great tool.
Reviewed in the United States on March 2, 2025 by Amazon Customer

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