When should I use a drain snake instead of a plunger?

Reach for a snake after a plunger and trap cleaning have failed, or when the clog is clearly deeper than the trap. A plunger works on clogs close to the drain that respond to pressure; a drain snake (auger) physically reaches 15 to 25 feet down the line to break through or hook out a blockage the plunger cannot move. If plunging produces no change and the P-trap is clear, the clog is farther down the branch line and a snake is the right tool. For hair clogs near a bathroom drain, a cheap barbed hair tool beats both.

What kind of drain snake do I need?

Match the tool to the drain. A hand-crank drum auger with about 25 feet of 1/4-inch cable handles most sink, tub and shower branch clogs. A toilet needs its own closet auger with a protective vinyl sleeve — never put a drum-auger cable in a toilet, it scratches the porcelain. For deep or main-line clogs, a larger drum or a powered auger is needed, and that is often where a homeowner reaches the limit of what to rent versus call a pro. Our ranked picks are in the best drain snake guide.

Can a drain snake damage my pipes?

It can if you force it. Feeding the cable too aggressively or cranking it hard against a bend can scratch or, in old or thin pipe, puncture it — and in older homes with corroded metal drains that is a real risk. Work the cable in with steady, gentle pressure, let the rotation do the work, and ease it around bends rather than shoving. If you meet a hard stop that will not give with reasonable effort, back off; that resistance can be a bad fitting or a collapsed pipe that forcing will only worsen.

How far should I push the drain snake?

As far as it takes to reach the clog, which for a branch drain is usually within 5 to 15 feet. Feed slowly and you will feel the cable meet the blockage as increased resistance. Do not just pay out the whole cable blindly — you want to work the clog where you find it. If you have fed 20-plus feet with no clog and no improvement, the blockage is likely in the main line, beyond a standard homeowner snake, and it is time to consider a pro with a longer powered auger.

Why is my drain still clogged after snaking it?

Either you broke through only part of the clog, or the blockage is somewhere the cable did not reach. Run plenty of hot water after snaking to flush the loosened debris, and consider snaking a second time — the first pass often bores a hole through a grease clog that then re-closes, while a second pass and hot water clears it fully. If snaking and flushing still leave a slow drain, and especially if multiple fixtures are affected, the problem is deeper in the branch or main line.

How to Snake a Clogged Drain: A Step-by-Step Guide

Written & researched by Priya Anand DIY & Tools Editor

Updated August 2026

Wide environmental view of a person's hands tightening a fitting under a kitchen sink with a wrench, in warm late-afternoon light

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Snaking a clogged drain is a DIY job when a plunger and a clean trap have not worked — about 30 minutes, $20 to $50 for a hand auger, no permit. A drain snake reaches 15 to 25 feet down the line to break through or hook out a clog. You feed the cable in, crank it through the blockage, and withdraw it slowly, then flush with hot water. The job stays DIY for branch-line clogs; if the cable runs out and multiple fixtures back up, the clog is in the main line and that is a pro's powered auger.

We never buy, test or physically handle the products we rank; recommendations come from aggregated owner reviews and expert consensus, described in how we rank. More at the DIY plumbing hub.

How to Snake a Clogged Drain — The Home Depot

Tools and materials

The right auger: a 25-foot hand-crank drum auger for sinks, tubs and showers; a closet auger for toilets. Ranked in best drain snake.
A bucket, towels, rubber gloves and eye protection.
A plunger to try first — see our ranked plunger picks.
Access to the trap; basic hand tools from a plumbing kit.

Low-angle view of a person's hands tightening a fitting under a kitchen sink with a wrench, in soft overcast light

Step 1: Choose your access point

Decide where to feed the cable. For a sink, the cleanest access is to remove the P-trap and feed the snake directly into the wall stub (the trap arm) — this skips the tight bends of the drain opening. For a tub, feed through the overflow opening after removing the cover plate. For a toilet, use a closet auger through the bowl. Put a bucket under any trap you open.

Step 2: Feed the cable in

Push the cable end into the opening and feed it in by hand until you feel resistance. Keep the drum close to the opening — a foot or so — so the exposed cable cannot whip or kink. Feed slowly; you are looking for the point where the cable meets the clog, which registers as a firm stop.

Wide view of a person's hands tightening a fitting under a kitchen sink with a wrench, in soft overcast light

Step 3: Work through the clog

Lock the cable with the drum's set screw and crank the handle clockwise while applying gentle forward pressure. The rotating tip either bores through a soft clog or hooks a solid one. Let the rotation do the work — do not ram the cable. If it binds, back off slightly and re-advance. Work the clog until the cable moves freely past it, a sign you have broken through.

Step 4: Retrieve the cable

Withdraw the cable slowly, still turning the handle, so anything you hooked comes back with it rather than dropping off. Have the bucket and towels ready — the cable comes out dirty. Wipe it down as you wind it back onto the drum so debris does not pack the drum.

Wide view of a person's hands tightening a fitting under a kitchen sink with a wrench, in soft early-morning light

Step 5: Flush and reassemble

Reconnect the trap or overflow plate. Run hot water hard for a minute or two to flush the loosened debris down the line. A grease clog often needs a second pass and more hot water — the first pass bores a hole that re-closes. If the drain now runs freely, you are done; if it is still slow, snake again or reconsider the location of the clog.

Common mistakes

Using a drum-auger cable in a toilet, scratching the porcelain — use a closet auger.
Forcing the cable and puncturing an old pipe or damaging a fitting.
Letting too much cable out of the drum, so it whips and kinks.
Not flushing with hot water afterward, leaving loosened debris to re-clog.

When to call a plumber

Call a pro if you have fed the full length of a homeowner snake with no clog reached, if multiple fixtures back up together (a main-line blockage), if water rises in the tub when you flush the toilet, or if you meet a hard immovable stop that could be a collapsed or root-invaded pipe. Those need a powered auger, a camera inspection, or excavation — well beyond a hand snake. There is no permit for clearing a drain, but main-line repairs are a different matter.

How to Snake a Clogged Drain