Note to readers: This post was updated on July 23, 2026 to add clearer step-by-step formatting and link to related drain cleaning and hydrojetting guides. We refreshed the details below so the advice reflects how we approach this work today.
A clogged drain that won’t budge with a plunger usually means the blockage is sitting deeper in the pipe than a plunger can reach. That’s where a drain snake (also called a plumber’s auger) comes in. It’s a long, flexible metal cable you feed into the pipe to break up or pull out whatever’s causing the clog.
Drain snakes are inexpensive, usually $15–$40 at any hardware store for a basic hand-crank model, and most homeowners can use one safely on a simple clog. Here’s how to do it right, and how to know when it’s time to stop and call a professional drain cleaning service instead.
What Is a Drain Snake and How Does It Work?
A drain snake is a coiled metal cable with a crank handle on one end and a corkscrew, hook, or barbed tip on the other. You feed the cable into the drain, crank it while pushing forward until you feel resistance, then twist through the clog to break it apart or snag it so you can pull it back out. Types range from small hand augers for sinks to longer cable-fed models for main line clogs.
Step-by-Step: How to Snake a Drain
1. Remove the P-Trap (sink drains)
Under most sinks, you’ll find a curved section of pipe called a P-trap. Removing it gives the snake a straighter shot into the drain line and lets you check whether the clog is sitting right there in the trap — often it is. Have a bucket underneath before you loosen the slip nuts; there will be standing water and debris.
2. Protect the work area
Lay towels or rags under the pipe. Snaking is a messy job by nature — you’re pulling hair, grease, and old debris back out with the cable.
3. Feed the cable in carefully
Push the tip into the drain opening and start feeding cable in by hand until you meet resistance. Go slow here. Forcing it can scratch or puncture older pipe, especially in homes with aging PVC or cast iron lines.
4. Crank and work the clog
Once you hit the blockage, start cranking the handle, alternating clockwise and counterclockwise. This lets the tip either hook the debris or break it apart so it can wash through. You’ll usually feel the resistance give way when it clears.
5. Withdraw slowly and check your progress
Pull the cable back out slowly and clean off whatever it brought with it. Run water to see if the drain flows freely. If it’s still slow, repeat the process — sometimes it takes a couple of passes.
6. Reassemble and test
Reattach the P-trap using fresh plumber’s tape on the threads, hand-tighten the slip nuts, and run water for a minute to confirm there are no new leaks and the clog is actually gone.
7. Clean the snake
Rinse the cable with hot water and dish soap before storing it. Leftover grease and debris will make it harder to use next time and can smell.
When to Call a Professional Instead
A hand-crank snake handles most simple sink and tub clogs. But call a plumber if:
- The clog keeps coming back within days or weeks of clearing it
- Multiple drains in the house are slow at the same time (this often points to a main sewer line issue, not a local clog)
- You hit something solid and unmoving, which could mean a collapsed or damaged pipe
- You’re not comfortable working around older or already-fragile plumbing
Recurring or whole-house clogs are often a sign the main line needs a deeper clean than a hand snake can provide. In those cases, hydrojetting clears the full diameter of the pipe rather than just punching a hole through the clog, and a sewer video camera inspection can show exactly what’s going on before any work starts.
If your drain isn’t cooperating, give Western Rooter & Plumbing a call. We handle drain clearing throughout the San Gabriel Valley, safely and without guesswork.
