Short answer
A drain snake is a flexible cable you feed into a drain to break up or pull out a clog. Use a small manual snake for a sink, tub or shower, a toilet auger for a toilet, and call a professional for main line problems. Feed it gently, never force it, and stop if the clog does not clear after a few passes.
A drain snake, also called a plumbing snake or drain auger, is the tool most homeowners reach for after a plunger fails. It can save a service call, and it can also scratch a toilet, damage an old pipe or push a clog into a worse spot. This guide covers the types, which one fits which clog, how to use a manual drain snake safely, when to stop, how to clean and store it, and how to decide between buying one and calling a professional.
It is based on This Old House plumbing guidance, an inspector's comparison of toilet augers and snakes, and extension and EPA pages on septic care, all opened for this page. It does not recommend brands and does not quote prices.
Drain snake types and what each is for
Names overlap. This Old House calls a drain snake a "drum auger," and sources use snake and auger loosely. What matters is the tool's form and where it can safely go.
| Type | What it is | Where it fits |
|---|---|---|
| Manual (hand) snake or drum auger | A coiled flexible cable with a hand crank and a thumbscrew lock | Small household clogs in a sink, tub or shower (This Old House) |
| Sink snake | A smaller, more flexible cable | Kitchen and bathroom sinks |
| Toilet (closet) auger | A stiffer cable with a protective rubber sleeve at the base | Toilet clogs near the waste inlet, without scratching porcelain |
| Drain-cleaning cable on a powered machine | A heavier cable driven by a motor | Tougher clogs, usually professional use |
This Old House describes power snakes as more suitable for tougher clogs or professional use. An inspection company's comparison says motorized augers handle larger pipes. For a main line, this is professional territory.
Toilet auger vs drain snake
This is the choice people most often get wrong. This Old House warns that a standard drain snake can scratch the porcelain of a toilet bowl and says that if plunging does not work, a closet auger, not a snake, is the tool to turn to. The closet auger has a protective rubber sleeve at its base that shields the porcelain as you advance it.
The comparison page also cautions not to push an auger too far, because the cable's pressure could crack the porcelain. If a toilet rocks, leaks at the base or smells of sewage, do not force any tool. Call a plumber. Our clogged drain guide explains why.
Which tool for which clog
| Problem | Start with | Move on to |
|---|---|---|
| Hair clog in a shower or tub | Hand removal, then a cup plunger | Manual snake, through the overflow for a tub |
| Slow bathroom sink | Clean the stopper and trap | Small sink snake |
| Kitchen sink | Plunger, trap cleaning | Manual snake. Grease may call for a different method, see hydro jetting below |
| Toilet | Flange plunger | Closet auger |
| Several fixtures slow, gurgling or backing up | Stop | Professional with a camera and a heavier machine |
This Old House says that when the stoppage is in the main drain piping lower in the building, a small hand snake will not be effective, and that a professional with a heavier electric drain cleaner is the better option. For step-by-step bathroom work, see how to clean a shower, sink or tub drain.
How to use a drain snake safely
These steps follow This Old House's guidance for a manual snake.
- Protect yourself. Wear gloves and eye protection, ventilate the room and keep the area dry. Put towels and a bucket nearby.
- Try the simpler tool first. A plunger, then the stopper and trap, before a snake. Old plumbing is delicate.
- Get access. Remove the shower cover, the tub overflow plate, or the sink trap if reachable. Going through a tub overflow gives a more direct route.
- Feed the cable gently. Lock the cable with the thumbscrew so you control the length, then turn the handle and push it in.
- Feel the difference. This Old House says a clog feels like moderate resistance, while a bend feels more like hitting a wall. Do not force it past a bend.
- Work the clog. Move the cable back and forth while turning the handle. Repeat two or three times, a little further each time.
- Pull it back while still turning. Clean off what comes up and put it in the trash.
- Test. Run water, then hot water, to confirm the drain is clear.
When to stop
Pipes and fixtures can be damaged by too much force or the wrong tool. Stop and call a professional if any of these happen:
- The cable stops hard and will not turn or advance.
- The clog does not clear after a few passes, or comes back within days or weeks.
- Several drains are slow, or water appears in the lowest drain in the house.
- There is gurgling, a sewage smell or visible damage to a pipe or fixture. This Old House lists these as reasons to call.
- Your plumbing is old, or you are uncomfortable with any step.
Do not combine a snake with chemical cleaners. This Old House warns chemical cleaners can damage pipes and endanger the next person to work on the drain, and a comparison of snakes and augers cautions that repeated use of harsh chemical cleaners can weaken a thin cable. Tell a plumber about any product you used.
Septic homes
The University of Nebraska-Lincoln extension and EPA both advise using boiling water or a drain snake to open clogs instead of chemicals, because chemicals can harm the organisms in a septic tank. A snake suits a septic home for a fixture clog. A slow drain in a septic home can also mean the tank or drain field is struggling, so if several fixtures are slow, or you see standing wastewater or smell sewage outside, call a septic professional and your county health department. See septic maintenance near me.
Cleaning and storing a drain snake
This Old House says to clean off debris after each retraction. As ordinary practice, rinse the cable, wipe it down, let it dry before you coil it away, and wash your hands. Check the manufacturer's instructions for your tool.
Buy a snake or call a professional?
A manual snake can make sense if you have a recurring hair clog in a tub, shower or bathroom sink, you are comfortable with the steps above, and your plumbing is in good shape. A closet auger is the toilet tool if you want one in the house.
Call a professional if the clog is anywhere shared, if the same drain keeps clogging, if the house has older or fragile plumbing, or if you are not sure which line is blocked. A professional typically uses a powered machine with heavier cable, may use a camera to see the pipe and may use hydro jetting for grease and buildup. These are explained in hydro jetting explained and sewer cleanout and sewer cleaning. If you are not sure where to start, find your sewer line cleanout, since that is where a professional usually goes in.
A call also buys a diagnosis. If the quote lists the method, the fees and a warranty, you can compare it. See drain cleaning near me and drain cleaning cost.
What to look up where you live
- State or provincial plumbing or contractor licensing board: to check a plumber's license.
- County health department: for sewage backups and septic systems.
- Your water or sewer utility: to find who owns the pipe between your house and the main.
Rules differ by place. Check the current rules for your state or county. For Canadian readers: plumbing is regulated by each province, products carry local labels, and quotes are in Canadian dollars.
For plumbing and drain company owners
Drain snake is the search your customers make when a clog beats the plunger, and some of them decide to call instead of buying a tool. If you want to be the company they find, read drain cleaning marketing and how to price drain cleaning and hydro jetting. You can also book a call with LiveLeadsLane. LiveLeadsLane is a marketing practice for contractors, not a directory, and it does not take jobs or refer homeowners.
