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Which to buy: for a K-400 on 1-1/2 to 3 in. lines, the RIDGID C-32IW (87582) 3/8 in. x 75 ft integral wound cable, the middle length of the three 3/8 in. IW cables RIDGID lists for the K-400. For a K-45 on 1-1/4 to 2 in. lines, the RIDGID C-1IC (56782) 5/16 in. x 25 ft inner core cable, which RIDGID lists with a bulb auger on the end. The C-32IW is listed as cable only; RIDGID sells its cutting tools (T-202, T-205 and others) as separate catalog items. Neither link is a machine or a bundle.
Quick answer: Order the cable RIDGID lists for your machine and your line size. The K-400 drum machine takes RIDGID’s integral wound (IW) cables: 3/8 in. (C-31IW, C-32IW, C-33IW) for 1-1/2 to 3 in. lines, or 1/2 in. (C-44IW, C-45IW) for 3 to 4 in. lines. Its manual says the torque limiter is designed for RIDGID 3/8 and 1/2 in. IW cable and may not protect other cables. The K-45 sink machine takes 1/4, 5/16 and 3/8 in. cables from its own list, starting with 1/4 and 5/16 in. for 3/4 to 1-1/2 in. lines.
Catalog numbers and line sizes come from RIDGID’s K-400 and K-45 operator’s manuals (accessory tables checked visually) and RIDGID’s K-400 specification sheet, read October 10, 2026. We have not tested these cables. The two buy links are the exact RIDGID 87582 (C-32IW) and 56782 (C-1IC) cables whose Amazon offers were checked on October 10, 2026 as new, sold by Amazon.com and in stock; offers change, so check that the listing names the catalog number. Other cables on this page are not linked.
K-400 cables
On a phone this table scrolls sideways; the model stays in view. Swipe the table, or tab to it and use the left and right arrow keys.
| Model | Catalog no. and length | Size and line |
|---|---|---|
| C-31IW | 87577; 50 ft (15 m) | 3/8 in.; 1-1/2 to 3 in. lines |
| C-32IW | 87582; 75 ft (23 m) | 3/8 in.; 1-1/2 to 3 in. lines |
| C-33IW | 87587; 100 ft (30 m) | 3/8 in.; 1-1/2 to 3 in. lines |
| C-44IW | 87592; 50 ft (15 m) | 1/2 in.; 3 to 4 in. lines |
| C-45IW | 87597; 75 ft (23 m) | 1/2 in.; 3 to 4 in. lines |
The manual’s tools table lists the T-202, T-217, T-205, T-206 and T-211 tools as fitting the C-31IW, C-32IW, C-33IW, C-44IW and C-45IW cables.
K-45 cables
On a phone this table scrolls sideways; the model stays in view. Swipe the table, or tab to it and use the left and right arrow keys.
| Model | Catalog no. and description | Size |
|---|---|---|
| S-1, S-2, S-3 | 50647, 50652, 50657; 15, 25 and 35 ft with bulb auger | 1/4 in. bulb auger |
| C-1, C-21 | 62225, 89400; 25 and 50 ft with bulb auger | 5/16 in. bulb auger |
| C-1IC, C-13ICSB | 56782 (25 ft inner core), 95847 (35 ft inner core, speed bump) | 5/16 in. bulb auger |
| C-13IC | 56792; listed as 35 ft with bulb auger | 5/16 in. bulb auger |
| C-2, C-22 | 62235, 89405; 25 and 50 ft with drop head auger | 5/16 in. drop head |
| C-2IC, C-23IC | 56787 (25 ft inner core), 56797 (35 ft) | 5/16 in. drop head |
| C-4, C-6, C-61C | 62245, 62260, 96037; 25, 35 and 35 ft with male coupling | 3/8 in. |
| C-5 | 62250; 35 ft with bulb auger | 3/8 in. |
The K-45 manual pairs each size with a line size: 1/4 in. and 5/16 in. cable for 3/4 to 1-1/2 in. lines, 5/16 in. inner core cable for 1-1/4 to 2 in. lines, and 3/8 in. cable for 1-1/4 to 2-1/2 in. lines. It gives reach of up to 45 ft with the 5/16 in. cables and up to 30 ft with 3/8 in. cable.
Loading a new cable
Both manuals put these steps under maintenance and set conditions first. The K-400 manual says the FOR/OFF/REV switch should be OFF and the machine unplugged before any maintenance, and to wear safety glasses and other appropriate protective equipment. The K-45 manual says to unplug the machine and to wear safety glasses and RIDGID drain cleaning gloves. Both warn that a new cable is under tension in its package and could strike you. Follow the full steps in your machine’s manual (linked under Sources); in short:
- K-400: uncoil the new cable completely first, feed about 24 in. through the guide tube so it coils into the drum counter-clockwise, and clamp the end at least 3 in. past the cable clamp.
- K-45: uncoil the new cable completely, put a 15 to 30 degree bend about 1 in. from the drum end, and coil it into the inner drum clockwise.
When to skip
- Skip the K-400 for tree roots. RIDGID’s manual says the K-400 is not designed to remove root blockages; a longer cable or a different head does not change that.
- Skip non-IW cable on a K-400 if you rely on its torque limiter; RIDGID says it may not protect other cables.
- Skip 1/2 in. cable for lines under 3 in. on the K-400, and 3/8 in. cable for lines over 2-1/2 in. on the K-45; neither manual lists those uses.
- Skip cables from other machines on the K-45; its manual warns that accessories made for other tools can be hazardous on it.
To compare the machines themselves, see RIDGID K-400 vs K-45.
Sources
- RIDGID K-400 operator’s manual (cdn2.ridgid.com), K-45 operator’s manual (cdn2.ridgid.com) and K-400 specification sheet (cdn2.ridgid.com), read October 10, 2026.
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