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 $629The Ridgid K-400 Drum Machine rates 3.8 among small lines drain cleaning machines; the General Mini-Rooter MR-C-O rates 2.4 among main lines ones. The Ridgid K-400 Drum Machine costs $871 less ($629 vs $1,500).

For a pro or building engineer who wants one compact machine for inside drains up to 4 in. Budget machines give more cable for less, but not this build.
Amazon $1,500Prices were last checked November 3, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different line size classes (small lines and main lines), and each is scored against the reference points for its own class, so a rating says how well each does among its own line size peers. How we rank explains each factor.
| Factor weight | Ridgid K-400 Drum Machine | General Mini-Rooter MR-C-O |
|---|---|---|
| Overall rating | 3.8/5 | 2.4/5 |
| Price 25% | 49 $629 | 43 $1,500 |
| Cable 25% | 70 75 ft of 3/8 in cable | 0 50 ft of 1/2 in cable |
| Motor 10% | 31 249 W motor | 31 249 W motor |
| Features 20% | 65 foot switch, reverse, cutters included | 65 foot switch, reverse, cutters included |
| Warranty 20% | 100 lifetime warranty | 0 1-year warranty |
Specifications
| Ridgid K-400 Drum Machine | General Mini-Rooter MR-C-O | |
|---|---|---|
| Cable | ||
| Type | Drum machine | Drum machine |
| Included cable | 75 ft x 3/8 in | 50 ft x 1/2 in |
| Drain sizes | 1.5 to 3 in | 1-1/4 to 4 in |
| Cutters included | 4 | 4 |
| Motor | ||
| Motor | 249 W | 249 W |
| Horsepower | 0.3 hp | 0.3 hp |
| Speed | 170 rpm | - |
| Voltage | 115 V | - |
| Controls and build | ||
| Auto feed | No | No |
| Foot switch | Yes | Yes |
| Reverse | Yes | Yes |
| Weight | 45 lb | 60 lb |
| Warranty | Lifetime | 1 year |