Which drain snake to buy: a spec checklist by job

01 /What drain snake do you need for each job?

The drain snake you need depends on the pipe diameter and how far the clog is from where you can get in. Start from the job, then pick the tool whose cable suits that pipe.

Line-by-line pairings are in the auger cable size chart, and the Auger Cable Sizer adds the head and machine class once you know the line, the distance and the clog type.

02 /Which drain snake specs actually matter?

The specs that matter are cable diameter, cable length, cable construction, how the cable is stored and locked, and how it is driven. Packaging often leads with motor power or the number of heads, which matter far less.

• Cable diameter: 1/4 inch for fixtures up to 2-inch pipe. Heavier cable will not turn a sink trap; lighter cable coils in larger pipe.
• Cable length: enough to reach the clog plus about a quarter extra for bends. Fifteen to 25 feet covers fixture drains; branches need more.
• Hollow-core or inner-core: hollow-core is more flexible for tight traps; inner-core resists kinking and carries more torque on longer runs.
• Enclosed drum: a closed plastic or metal drum keeps drips off the floor and the cable out of the way. Open reels are messier.
• Lock or chuck: a thumbscrew or chuck that grips firmly stops the cable sliding back into the drum under load.
• Auto-feed: a trigger or lever that advances and retracts cable while it spins. Convenient, but release it at the first sign of loading.
• Head options: a bulb or grabber for hair, and a small cutter for packed material, are worth having. A dozen novelty heads are not.
• Replacement cable: check that replacement cable and heads are available for the model; cable wears out before the drum does.

03 /Are drill-powered drain augers worth it?

Drill-powered drain augers are worth it for anyone who clears sinks and tubs regularly, because the drill supplies the rotation and your hands only guide the cable. They work only if the drill runs slowly. A cordless drill at full speed twists 1/4-inch cable into a kink in seconds when the head meets resistance.

• Use a drill with a clutch and a low-speed setting, and set the clutch low so it slips before the cable winds up.
• Do not use an impact driver. Its hammering action is hard on thin cable and gives poor control.
• Advance in short bursts, stopping the drill each time you feed more cable.
• Keep the cable locked close to the drum outlet so little cable is exposed between the tool and the drain.
• Retrieve with the drill turning slowly forward, the same as with a hand crank.

A drill attachment does not turn a light fixture auger into a main-line tool. The cable is the limit, not the motor.

04 /Is a 50-ft drain auger worth buying?

A 50-ft drain auger is worth buying if you have repeat clogs in a floor drain, laundry branch or basement branch and are comfortable running a powered machine. Fifty-foot machines usually carry 3/8 or 1/2-inch cable, which suits 2 to 3-inch lines well. It is not the right purchase for a main line in most Canadian houses.

• Reach: a lateral from a basement cleanout to the municipal main can run well past 50 feet once bends and the drop are included, so a 50-ft cable may stop short.
• Cable weight: 3/8-inch cable is light for a 4-inch lateral with roots; 1/2-inch is the minimum and heavier is better.
• Weight and storage: drum machines are heavy and need a dry place to live.
• Frequency: if you would use it once every few years, renting the right machine for the day is usually more sensible; see renting vs buying an auger.

05 /What drain snakes do plumbers use?

Plumbers and drain cleaners use a range of snakes sized to the pipe, not one universal tool. A typical service vehicle carries something for every step from the toilet bowl to the municipal main, plus the means to see inside the pipe.

• Closet augers in 3 and 6-ft lengths for toilets.
• Handheld battery drum augers with 1/4 or 5/16-inch cable for sinks, tubs and showers.
• Drop-head or small drum machines with 5/16 to 3/8-inch cable for branches and commercial sinks.
• Medium drum machines with 1/2-inch cable for stacks, floor drains and building drains.
• Sectional machines with 5/8, 7/8 or 1-1/4-inch cable for laterals, larger pipe and heavy roots.
• A push camera with a locator, and on many trucks a jetter for grease and sludge.

The difference between a professional and a homeowner is less the tools than the judgement about which cable, which head and when to stop. The full range of machines is compared in types of drain augers.

06 /Are cheap plastic drain snakes any good?

Cheap plastic drain snakes, the barbed strips sold in hardware stores, discount stores and supermarkets, are good at one thing: pulling hair out of the first 30 to 50 cm of a bathroom sink, tub or shower drain. For that job they are often all you need. They are not augers; they cannot rotate, they snap in tight traps, and they do nothing for a clog beyond the trap.

Low-cost steel hand drums are a step up. The cheapest ones use thin cable in a flimsy drum and are fine for occasional sink clogs. If you clear drains more than once or twice a year, a sturdier drum with a positive cable lock and a replaceable cable is the better buy.

07 /What should a household buy, rent or hire?

1. Buy: a flange plunger, a closet auger and a 1/4-inch hand or drill drum auger. Together they handle most household clogs; see toilet auger vs plunger vs drain snake and what size toilet auger you need.
2. Rent: a drum machine for an occasional floor drain or branch clog, if you are confident running powered equipment.
3. Hire: main lines, roots, repeat clogs, sewage in the basement and any job without a usable cleanout.

Keep what you buy clean and dry between jobs; cleaning and storing a drain auger covers it. Typical tool and rental ranges are in renting vs buying an auger, and when the job points past the fixtures, you can request quotes from drain professionals.

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