A slow bathtub drain almost always means hair, soap scum, and biofilm have built up in the P-trap or the first few feet of horizontal branch line. Knowing how to snake a bathtub yourself saves the $185 to $310 a plumber charges for a single fixture clear, and the job takes under thirty minutes once you understand the trap geometry. The hardest part is usually getting past the strainer or stopper — the snaking itself is straightforward.
If chemical drain cleaners like Drano Max Gel have already failed (and they often do on hair clogs), mechanical removal is the only reliable next step before calling in a pro.
Choose the Right Snake for the Job
Cable diameter matters more than length for a bathtub. A 1/4-inch or 5/16-inch drum auger handles 95 percent of tub clogs and threads through the 1.5-inch trap arm without binding. Skip the big 3/8-inch sewer cables — they will jam in the trap and possibly crack a chrome P-trap.
The Ridgid Power Spin+ with AUTOFEED runs about $59 at Home Depot and gives you 25 feet of 1/4-inch inner core cable plus a drill attachment for hands-free feeding. A budget option like the Cobra 20-inch zip stick costs $4 and clears surface hair clogs, but anything past the overflow tee needs a real auger.
Remove the Stopper and Strainer First
You cannot snake through most bathtub stoppers. The mechanism — whether toe-tap, lift-and-turn, push-pull, or trip lever — sits directly in the path of your cable and will deflect or snag it.
For a toe-tap or lift-and-turn stopper, twist counterclockwise until it unscrews from the strainer post. Push-pull models lift straight out after you unscrew the cap. Trip lever assemblies require you to remove the overflow plate (two screws) and pull the linkage out from the top — the actual stopper inside the drain is a brass plunger that lives in the overflow tube. Set every screw and component in a small bowl so nothing rolls down the drain you are about to open.
Pick Your Access Point
You have two ways into the trap: through the tub drain itself, or through the overflow opening behind the tub spout end. The overflow is almost always the better route for snaking because the cable runs straight down into the trap weir without having to navigate the 90-degree bend at the drain shoe.
Pop off the overflow cover plate with a Phillips screwdriver. If a trip lever linkage is attached, pull it out completely. You now have a clean 1.5-inch opening that feeds the cable directly into the vertical overflow tube and down to the trap.
Feed the Cable
Pull about 18 inches of cable out of the drum and hand-feed it into the overflow opening. You will feel the first resistance when the cable reaches the trap weir — about 8 to 14 inches in on most residential tubs. Rotate the drum handle clockwise as you push, letting the cable corkscrew through the trap.
Past the trap, the cable runs into the horizontal branch line that ties into the main stack. Most bathtub clogs sit within the first 3 feet, often right at the trap outlet where soap scum coats the inside of the pipe. Keep cranking and pushing until you hit firm resistance — that is your clog.
Break Up the Clog
Once you feel resistance, do not just shove harder. Pull the cable back six inches, rotate the drum five or six full turns to build cable tension, then push back into the clog. The spinning tip chews through hair while the cable flex breaks soap scum loose. Repeat this pull-rotate-push cycle four or five times.
You will know the clog is broken when the cable suddenly feeds another foot or two with no resistance. Pull it back out slowly while still rotating clockwise — counterclockwise rotation can unspool the cable inside the pipe and create a much bigger problem. Hair will come back with the cable; wipe it off into a trash bag every couple of feet.
Flush and Test
With the cable fully retracted, run hot water through the tub at full volume for three minutes. The drain should swallow it without backing up. If the water still pools, the clog is either deeper than your cable reached or sits in the main branch line and needs a longer auger or a plumber’s drain camera.
For a final cleanup, pour a kettle of boiling water down the drain followed by a half cup of dish soap. The combination dissolves residual soap scum loosened by the cable. Some pros follow up with an enzyme treatment like Bio-Clean ($28 for a 2-pound jar) once a month to keep biofilm from rebuilding — it is far gentler on cast iron and PVC than caustic cleaners.
Reassemble and Prevent Future Clogs
Reinstall the overflow plate with the trip lever linkage in the same orientation, then thread the stopper back into the strainer post. Snug everything by hand — overtightening the overflow screws will crack the plate or strip the threaded inserts in the tub flange.
The best prevention is a $2 silicone hair catcher that drops over the strainer. The OXO Good Grips Silicone Drain Protector ($8 at Target) catches 95 percent of shed hair before it ever enters the trap. Empty it weekly into the trash and you may never need to snake the tub again.
When to Stop and Call a Pro
- Cable bottoms out at 15 feet without finding a clog — points to a main line issue
- Multiple fixtures back up simultaneously — likely a main sewer blockage
- Gurgling from toilets or sinks when the tub drains — vent stack problem
- Sewage smell that persists after clearing — possible cracked trap or dry P-trap elsewhere
- Cable damages the tub finish — chrome trap arms in old houses are brittle
For any of those scenarios, a licensed plumber with a drain camera and a 75-foot K-50 sectional machine is worth the call. For everyday hair clogs, a $59 drum auger and twenty minutes of patience handles the job.
