Ridgid K-400 AUTOFEED Drum Machine
#4 in Small linesFull review
For anyone clearing small drains often who wants auto feed on a machine built to last. It is the same K-400 with a powered feed added.
Amazon $949.07$949.07
3.7/5
For a Milwaukee M18 owner who wants a cordless small line machine. It skips the extension cord but costs more than corded drum machines of the same size.
- 75 ft x 3/8 inCable
- 1.5 to 3 inDrain sizes
- NoAuto feed
Check price at Acme Tools$699
Price checked November 3, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Runs on a battery, so there is no cord to run through the house
- 75 ft of 3/8 in cable reaches far down tub and floor drains
- Comes with a battery, charger and five cutter heads
- Drum lifts off to swap cables or clean out
Cons
- Auto feed is an extra purchase
- Milwaukee does not publish motor power or speed
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its line size. How we rank explains each one.
Specifications
| Model number | 2817A-21 |
|---|---|
| Cable | |
| Type | Drum machine |
| Included cable | 75 ft x 3/8 in |
| Drain sizes | 1.5 to 3 in |
| Cutters included | 5 |
| Motor | |
| Voltage | 18 V |
| Cordless | Yes |
| Controls and build | |
| Auto feed | No |
| Foot switch | Yes |
| Warranty | 5 years |
Alternatives in this line size
Ridgid K-400 Drum Machine
#5 in Small linesFull review
For homeowners and handymen who clear small drains often and want a machine that lasts. It costs more than the clones but is built and backed for years of use.
Amazon $629$629
Vevor JR-400Z 75 ft Drain Machine
#6 in Small linesFull review
For a homeowner who wants auto feed on a budget for sink, tub and floor drains. Expect less durability and support than a pro brand.
Amazon $309.90$309.90
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