HoldwellS 100 ft x 1/2 in Drain Machine
#4 in Main linesFull review
For an occasional user who wants a 3 to 4 in line machine for the least money. A no name clone with little support.
Amazon $331.19$331.19
The HoldwellS 100 ft x 1/2 in Drain Machine is the better drain cleaning machine overall, rated 3.6 to 3.5. The HoldwellS 100 ft x 1/2 in Drain Machine leads on price and features. The Ridgid K-750 AUTOFEED Drum Machine wins on cable. The HoldwellS 100 ft x 1/2 in Drain Machine costs $3,091.74 less ($331.19 vs $3,422.93).
Ridgid K-750 AUTOFEED Drum Machine
#8 in Main linesFull review
For plumbers and building crews who clear main lines and roots every week. It is overkill for a homeowner with one stubborn clog.
Amazon $3,422.93$3,422.93
Prices 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.
Which should you buy?
- Choose the HoldwellS 100 ft x 1/2 in Drain Machine for price ($331.19 vs $3,422.93) and features (auto feed, foot switch, reverse, cutters included vs auto feed, cutters included).
- Choose the Ridgid K-750 AUTOFEED Drum Machine for cable (100 ft of 5/8 in cable vs 100 ft of 1/2 in cable).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every main lines drain cleaning machine; a clear win is highlighted. How we rank explains each one.
| Factor weight | HoldwellS 100 ft x 1/2 in Drain Machine | Ridgid K-750 AUTOFEED Drum Machine |
|---|---|---|
| Overall rating | 3.6/5 | 3.5/5 |
| Price 25% | 96 $331.19 | 13 $3,422.93 |
| Cable 25% | 45 100 ft of 1/2 in cable | 68 100 ft of 5/8 in cable |
| Motor 10% | 50 motor power not published (neutral score used) | 57 373 W motor |
| Features 20% | 100 auto feed, foot switch, reverse, cutters included | 55 auto feed, cutters included |
| Warranty 20% | 0 warranty not published, scored as none | 100 lifetime warranty |
Specifications
| HoldwellS 100 ft x 1/2 in Drain Machine | Ridgid K-750 AUTOFEED Drum Machine | |
|---|---|---|
| Cable | ||
| Type | Drum machine | Drum machine |
| Included cable | 100 ft x 1/2 in | 100 ft x 5/8 in |
| Drain sizes | 2 to 6 in | 3 to 6 in |
| Cutters included | 8 | 5 |
| Motor | ||
| Motor | - | 373 W |
| Horsepower | - | 0.5 hp |
| Speed | 1,800 rpm | 200 rpm |
| Voltage | - | 115 V |
| Controls and build | ||
| Auto feed | Yes | Yes |
| Foot switch | Yes | - |
| Reverse | Yes | - |
| Warranty | - | Lifetime |