20V Max Lithium Ion Cordless PEX Expansion Tool Kit, w/ 1/2", 3/4" and 1" Heads, (2) Batteries, Charger

DeWalt 20V Max Lithium Ion Cordless PEX Expansion Tool Kit with 1/2", 3/4" and 1" Heads, Two Batteries, and Charger

The DeWalt DCE400D2 is a cordless PEX expansion tool built to expand PEX Type-A tubing from 3/8" to 1" faster than any competing tool on the market. This 20V Max system delivers 60 strokes per minute with an automatic rotating head that ensures even expansion on every connection, eliminating the fatigue and inconsistency that comes with manual expanders. Designed for plumbing professionals working in tight crawl spaces, behind walls, and under sinks, this tool pairs full trigger actuation with a compact 6.75" length so you can make reliable connections where other tools won't fit. The kit arrives ready to work with three expansion heads (1/2", 3/4", and 1"), two 20V Max lithium ion batteries, a charger, PEX expander grease, and a rugged kit box for organized storage and transport.

Key Features & Benefits

• Fastest Expansion Speed: Operates at 60 strokes per minute, cutting job time in half compared to manual expanders and keeping pace with the fastest work schedules.
• Automatic Rotating Head: The head rotates automatically during each expansion cycle to distribute pressure evenly around the tubing, preventing weak spots and ensuring leak-proof connections every time.
• Full Trigger Actuation for Tight Spaces: The trigger activates expansion with minimal hand movement, letting you work in cramped joist bays, wall cavities, and under fixtures where you can't get a full grip on larger tools.
• Bright Onboard LED Work Light: An integrated LED illuminates dark work areas so you can see tubing alignment and fitting position clearly, reducing errors in basements, crawlspaces, and behind appliances.
• Dual-Sided Hang Hook and Belt Hook: Hang the tool on joists or clip it to your belt between connections, keeping it within reach and off dirty floors throughout the day.
• Rubber Overmold Grip: The ergonomic handle reduces hand strain during all-day use and provides secure control even when your hands are wet or greasy.
• Cross-Brand Head Compatibility: Uses DeWalt PEX heads and accepts Milwaukee and Uponor expansion heads, so you can standardize on one tool body across different fitting systems.
• 20V Max System Integration: Shares batteries with the full DeWalt 20V Max cordless platform, eliminating the need to carry multiple chargers and battery types to the jobsite.

Compatibility & Requirements

This tool expands PEX-a tubing in five sizes: 3/8", 1/2", 5/8", 3/4", and 1". The kit includes expansion heads for 1/2", 3/4", and 1" tubing. Separate 3/8" and 5/8" heads must be purchased if needed. The tool accepts DeWalt, Milwaukee, and Uponor brand expansion heads. It operates on DeWalt 20V Max lithium ion batteries and comes with two DCB203 batteries and a charger.

What's Included

• DCE400 PEX Expander Tool
• Three expansion heads: 1/2", 3/4", and 1"
• Two DCB203 20V Max lithium ion batteries
• Battery charger
• PEX expander grease
• Kit box

Warranty & Support

DeWalt covers this tool with a three-year limited warranty, one year of free service, and a 90-day money-back guarantee.

Frequently Asked Questions

Q: Does DeWalt make a PEX expansion tool?
A: Yes. DeWalt manufactures the DCE400D2, a 20V Max cordless PEX expansion tool designed specifically for expanding PEX-a tubing from 3/8" to 1". The tool operates at 60 strokes per minute with an automatic rotating head and ships as a complete kit with three expansion heads, two batteries, a charger, and grease.

Q: What is the best PEX expansion tool?
A: The DeWalt DCE400D2 is the fastest PEX expansion tool on the market, running at 60 strokes per minute. It combines speed with an automatic rotating head for even expansion, full trigger actuation for tight-space work, and a 6.75" compact length that fits where manual and larger cordless tools cannot. The rubber overmold grip reduces fatigue during all-day use, and the integrated LED work light improves accuracy in dark areas.

Q: Can you install PEX-a without an expansion tool?
A: PEX-a tubing requires an expansion tool to properly enlarge the tubing so fittings can be inserted before the tubing returns to its original shape and creates a watertight seal. The DeWalt DCE400D2 automates this process with 60 strokes per minute and automatic rotation, ensuring consistent expansion that manual methods and hand tools cannot match. Without an expander, PEX-a fittings will not install correctly.

Q: What are the benefits of using a DeWalt PEX expander?
A: The DeWalt DCE400D2 eliminates the hand fatigue and slow pace of manual expanders by delivering 60 automatic expansion cycles per minute. Its compact 6.75" length and full trigger actuation let you work in tight crawlspaces and wall cavities. The automatic rotating head ensures even pressure distribution on every connection, reducing the risk of leaks. An onboard LED light improves visibility in dark areas, and dual hang hooks keep the tool accessible throughout the workday.

Q: What size PEX tubing does the DeWalt DCE400D2 kit expand?
A: The kit expands PEX-a tubing in 1/2", 3/4", and 1" sizes using the three included expansion heads. The tool is compatible with 3/8" and 5/8" tubing as well, but those expansion heads must be purchased separately. The expander operates on any PEX-a tubing within the 3/8" to 1" range when equipped with the appropriate head.

Q: How long do the batteries last on the DeWalt 20V PEX expansion tool?
A: The kit includes two DCB203 20V Max lithium ion batteries. Battery runtime depends on tubing size and expansion frequency, but the dual-battery setup ensures you can swap to a fresh battery and continue working while the depleted battery recharges. The batteries integrate with the full DeWalt 20V Max tool platform for cross-tool compatibility.

Q: Is the DeWalt PEX expander compatible with Milwaukee or Uponor expansion heads?
A: Yes. The DeWalt DCE400D2 accepts DeWalt PEX heads and is compatible with Milwaukee and Uponor brand expansion heads. This cross-brand compatibility allows you to use one tool body with different fitting systems and eliminates the need to purchase multiple expanders for different manufacturers' fittings.

Q: What warranty does DeWalt provide on the DCE400D2 PEX expansion tool kit?
A: DeWalt backs this kit with a three-year limited warranty covering defects in materials and workmanship. The warranty also includes one year of free service for maintenance and a 90-day money-back guarantee if the tool does not meet your needs.

Q: How does the automatic rotating head work on the DeWalt PEX expander?
A: The automatic rotating head spins during the expansion cycle to distribute pressure evenly around the entire circumference of the PEX tubing. This rotation prevents uneven stretching and ensures the tubing expands uniformly, which creates a secure seal when the fitting is inserted and the tubing contracts back to size.

Q: What maintenance does the DeWalt 20V PEX expansion tool require?
A: The kit includes PEX expander grease that should be applied to the expansion heads to reduce friction and extend head life. Beyond regular greasing of the heads, the tool requires minimal maintenance due to its cordless design and durable construction. Keep the battery contacts clean and store the tool in the included kit box to protect it from jobsite debris.