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 eBay$629
The Ridgid K-400 Drum Machine is the better drain cleaning machine overall, rated 3.8 to 3.4. The Ridgid K-400 Drum Machine leads on price and motor. The Ridgid K-3800 AUTOFEED Drum Machine wins on features. The Ridgid K-400 Drum Machine costs $1,471.25 less ($629 vs $2,100.25).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases. As an eBay Partner, we may be compensated if you make a purchase.
Ridgid K-3800 AUTOFEED Drum Machine
#8 in Small linesFull review
For a plumber who wants one drum machine for indoor branch lines, from sink traps to 4 in floor drains with a cable swap. Homeowners get the same 3/8 in reach from a K-400 for much less.
Amazon $2,100.25 eBay$2,100.25
Which should you buy?
- Choose the Ridgid K-400 Drum Machine for price ($629 vs $2,100.25) and motor (249 W motor vs 75 W motor).
- Choose the Ridgid K-3800 AUTOFEED Drum Machine for features (auto feed, foot switch, cutters included vs foot switch, reverse, cutters included).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every small lines drain cleaning machine; a clear win is highlighted. How we rank explains each one.
| Factor weight | Ridgid K-400 Drum Machine | Ridgid K-3800 AUTOFEED Drum Machine |
|---|---|---|
| Overall rating | 3.8/5 | 3.4/5 |
| Price 25% | 49 $629 | 0 $2,100.25 |
| Cable 25% | 70 75 ft of 3/8 in cable | 70 75 ft of 3/8 in cable |
| Motor 10% | 31 249 W motor | 0 75 W motor |
| Features 20% | 65 foot switch, reverse, cutters included | 80 auto feed, foot switch, cutters included |
| Warranty 20% | 100 lifetime warranty | 100 lifetime warranty |
Specifications
| Ridgid K-400 Drum Machine | Ridgid K-3800 AUTOFEED Drum Machine | |
|---|---|---|
| Cable | ||
| Type | Drum machine | Drum machine |
| Included cable | 75 ft x 3/8 in | 75 ft x 3/8 in |
| Drain sizes | 1.5 to 3 in | 1.5 to 3 in |
| Cutters included | 4 | 3 |
| Motor | ||
| Motor | 249 W | 75 W |
| Horsepower | 0.3 hp | 0.1 hp |
| Speed | 170 rpm | 240 rpm |
| Voltage | 115 V | 115 V |
| Controls and build | ||
| Auto feed | No | Yes |
| Foot switch | Yes | Yes |
| Reverse | Yes | - |
| Weight | 45 lb | 71 lb |
| Warranty | Lifetime | Lifetime |