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phoinix | Staff 14.2K Views
Aug 1, 2026 9:57 AM

DEWALT 20V MAX 1" Pex Expander (Tool Only)

$299

$399

25% off
+ Free S&Hat Amazon
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Deal Details
Amazon has DEWALT 20V MAX 1-in. Pex Expander (Tool Only, DCE400B) for $299. Shipping is free.

Acme Tools has DEWALT 20V MAX 1-in. Pex Expander (Tool Only, DCE400B) for $299. Shipping is free.

Thanks to Deal Hunter phoinix for posting this deal.

About this item:
  • 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.)
Includes:
  • (1) DCE400 PEX Expander
  • (1) DCE40012 ½" PEX Expander Head
  • (1) DCE40034 ¾" PEX Expander Head
  • (1) DCE4001 1" PEX Expander Head
  • (1) PEX Expander Grease
  • (1) Kit Box
  • 3 Year Limited Warranty

Editor's Notes

Written by SubZero5 | Staff
  • About this deal:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this store:

Original Post

Written by phoinix | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has DEWALT 20V MAX 1-in. Pex Expander (Tool Only, DCE400B) for $299. Shipping is free.

Acme Tools has DEWALT 20V MAX 1-in. Pex Expander (Tool Only, DCE400B) for $299. Shipping is free.

Thanks to Deal Hunter phoinix for posting this deal.

About this item:
  • 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.)
Includes:
  • (1) DCE400 PEX Expander
  • (1) DCE40012 ½" PEX Expander Head
  • (1) DCE40034 ¾" PEX Expander Head
  • (1) DCE4001 1" PEX Expander Head
  • (1) PEX Expander Grease
  • (1) Kit Box
  • 3 Year Limited Warranty

Editor's Notes

Written by SubZero5 | Staff
  • About this deal:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this store:

Original Post

Written by phoinix | Staff

Community Voting

Deal Score
+53
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Community Reviews

The DEWALT DCE400B is a PEX A expansion tool that stands out for fast, easy installs and strong performance on 1 inch lines. It is described as a workhorse for repiping and a breeze for novice use, with included expander heads making the kit more complete than the tool only label suggests. The main limitation is that the tool only package does not include a battery or charger, and the extra power matters most on larger fittings. It looks like a solid entry into PEX A expansion if 1 inch work is part of the job.

Common Questions (4)

  • It includes the expander heads, and the kit is not 1-inch only; it expands 3/8, 1/2, 3/4, and 1-inch PEX Type-A with separate heads. "Tool Only" means it does not include batteries or a charger.

  • It is aimed at PEX-A expansion, which gives better flow and more flexible routing than PEX-B. Some PEX-B can also be used with expansion tools and fittings, but PEX-B generally has a smaller inner diameter and may need larger pipe sizes to match PEX-A flow.

  • It makes PEX-A installation much easier and can be a workhorse for whole-house repipes and other plumbing jobs. It is also reported to make novice installation a breeze.

  • It has more power than the Milwaukee M12, and that difference is most noticeable on 1-inch fittings. For lots of 1-inch lines, it is the better pick because the M12 can be noticeably slower.

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23 Comments

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Aug 2, 2026 5:52 PM
14 Comments
Joined Aug 2022
ThriftyHome996Aug 2, 2026 5:52 PM
14 Comments
Includes the heads i also bought this tool. Makes installation a breeze for a novice. Paid $399 at Lowes 2 months ago.
Aug 3, 2026 2:41 AM
86 Comments
Joined Sep 2016
PhlontAug 3, 2026 2:41 AM
86 Comments
Quote from mgilch View quoted comment :
Hi just to be clear this is tool only it's called 1" expander meaning it can use 3/8, 1/2, 3/4 & 1" expander heads(sold separately). It not a 1" only expander. But like I said it's only the tool I don't see that expander heads are included and battery either Description says "The pex tool expands 3/8-inch - 1-inch Pex Type-A tubing"The picture show two expander heads however what's in the box does not say any heads are included
I ordered it for it today yes it comes with the three heads and the tool. No battery or charger.
Aug 3, 2026 4:09 AM
45 Comments
Joined Oct 2020
BraveMorning116Aug 3, 2026 4:09 AM
45 Comments
Home Depot price matched for me

I needed it to replace a stripped Accor PushOn Angle Stop valve today. It worked great! I recommend this machine.

I love Pex A Cold Expansion
Aug 3, 2026 4:06 PM
191 Comments
Joined Jun 2003
mtiffeeAug 3, 2026 4:06 PM
191 Comments
I with the 1.25" would ever go on sale
Aug 4, 2026 1:09 AM
23 Comments
Joined Dec 2013
realralAug 4, 2026 1:09 AM
23 Comments
Home Depot now has this at the same price as of today. If a person is looking to get into pex a with a tool that's reputable it's never been cheaper. I doubt the Milwaukee M12 will ever get this cheap.
Aug 6, 2026 12:07 AM
771 Comments
Joined Oct 2020
Cisco408caAug 6, 2026 12:07 AM
771 Comments
I wanna bite but has it ever gone any lower ?
Aug 6, 2026 12:47 AM
395 Comments
Joined Jan 2011
PM-Me-Your-CouponsAug 6, 2026 12:47 AM
395 Comments
Quote from Cisco408ca View quoted comment :
I wanna bite but has it ever gone any lower ?
I paid $284 on Amazon with a 2ah battery and charger. In 2020Considering inflation, that essentially took the battery and charger out of the deal.
1

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