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DEWALT

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

  • Based on 1,150 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Sep 17
Order within 14 hours and 16 minutes
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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


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: Thursday, Sep 17

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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Top Amazon Reviews

    • 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
    • It works. Sturdy tool.
Review Image by Chowmein G
Yup. Great tool. Very user friendly and great quality. Pretty darn sturdy construction and nice to have when I need it. I mainly run dewalt tools and this is one of my favorite when I’m doing PEX work. It will take a while for it to pay for it’s self but I also know this is a tool that will last me a lifetime. ... show more
Reviewed in the United States on May 7, 2026 by Chowmein G
    • Great tool
Great tool
Reviewed in the United States on August 27, 2026 by Amazon Customer
    • Total game-changer
I'm a do-it-yourselfer and have remodeled 5 homes in as many years. I've been using Pex B with a crimp tool, thinking Pex A (aka Pro Pex) was beyond my needs, especially considering the cost of the tool. I was soooo wrong, and I should have bought this tool 5 years ago. At the local big-box home improvement store, Pex A fittings are basically the same price as Pex B, as is the tubing. The tool is expensive, I have to concede that point, but the time savings and ease of use is remarkable. Also, the quality of the connections is better, as is the flow since the ID of the fittings matches the tubing itself. Because Pex B fittings have to slide into the unexpanded tubing, the ID of the fittings is generally 1/8" smaller than the tubing. With Pex A, the tubing gets expanded to fit around the fitting then shrinks to create an extremely strong seal. But you already knew that.... If you're on the fence, go for it and get this tool. Even if all you do is install a new hot water heater or bathroom sink, you'll appreciate it. ... show more
Reviewed in the United States on May 8, 2026 by Xygxag
    • Great product
Works great, follow directions with lubrication
Reviewed in the United States on July 28, 2026 by JW Ideas
    • Much safer than soldering
I'm not a "professional" contractor but I've had to repair a lot of their work afterwards... This tool is expensive up front. But not when you consider 10 feet of PEX A pipe is under $6 and 10 feet of copper is over $60. This is so easy and fast to use and there is no flame like there is with soldering. You have to have your ducks in a row when working. Recently I had to replace a push to fit connector that failed underground. This was on the main water line to the house. You slide the right size expansion ring on the pipe first, have the right size coupler ready and get busy. The tool has a cone shaped end for the pipe being used. Put the cone as far as you can inside the pipe and squeeze the trigger. The cone will expand as you push it further inside the pipe. After about 6 rotations you have a few seconds to push the coupler fitting inside the pipe. Wait a few seconds, very quickly the pipe will contract back to original size and you repeat on the other end to join 2 pipes together. The plastic fittings won't rust underground. Pay attention when buying PEX pipe. This will only work on PEX A pipe. So don't go for PEX B or C because it doesn't work. If you do much plumbing this tool is a great investment. You can get hand powered expanders but you'll hate yourself after a few connections. It's not a tool I use real often but it can pay for itself with one large project with the price of copper today. ... show more
Reviewed in the United States on April 15, 2026 by Bob Kennedy
    • 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
    • Like magic
I moved from Pex B to Pex A on my latest replumbing of my house and decided that I'd buy this (on sale) and I could always sell it later, rather than struggle with the manual. This could not be more fun to use. It makes me want to spend my retirement as a plumber. I had a fair amount of experience with both bands and rings with Pex B and never had a leak, but this is really the bomb. Just be absolutely sure you are moving to Pex A fittings because they only way they interchange is backwards compatible. Love it. ... show more
Reviewed in the United States on April 7, 2026 by Ebooker

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