Why Won't My Bathtub Drain At All?

October 28, 2026

A tub that is completely stopped, not just slow, almost always traces back to hair caught behind the overflow plate or further down past the trap. Working through it in that order saves you from snaking a drain that a few minutes with a screwdriver could have fixed.

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Short answer

A bathtub that won't drain at all is usually a hair clog, either on the stopper mechanism behind the overflow plate or further down the line. Roto-Rooter says accumulated hair is the most common cause of bathtub clogs. Check and clean the overflow plate first, try a plunger next, and snake the line if neither works.

Key facts

Roto-Rooter says accumulated hair is the most common cause of clogs in bathtubs.
Roto-Rooter notes that tub drains typically clog gradually, so you usually see the tub draining slower and slower before it stops completely.
Roto-Rooter's plunger method calls for a lot of force to create enough pressure to dislodge the clog, and notes plungers only work on certain clogs.
Roto-Rooter's snaking method has you crank out about 30 inches of wire into the drain opening before you reach most clogs.
Build.com's tub waste guide notes that on a trip-lever assembly, the visible drain opening is just a grate, while the actual stopper is a hidden plunger inside the overflow pipe.

A sudden full stop is unusual

Most bathtub clogs build slowly. Roto-Rooter's own guide to clearing a tub drain notes that "tub drains get clogged gradually, and odds are that you'll see your tub initially draining slower and slower before it's completely clogged."

If your tub went from fine to completely stopped with no warning, it's still worth starting with the same checks as a gradual clog. Hair accumulates every time someone bathes, and it is easy to miss until the last bit of clearance finally closes off.

Start at the overflow plate, not the visible drain

Unscrew the plate under the faucet and above the drain, keeping the screws somewhere they can't fall into the drain. If your tub has a trip lever on that plate, the visible opening at the bottom of the tub may just be a grate. Build.com's tub waste guide explains that on these assemblies, "the trip-lever actuator lever mounted over the overflow plate has an internal plunger that moves to seal off the drainpipe itself," while "the tub drain is blocked by a grate to keep debris out of the pipes."

That means hair and soap can build up on the hidden plunger inside the overflow pipe even when the drain opening itself looks clear. Roto-Rooter's instructions are direct here: "clean any hair and soap off of the overflow plate and the stopper mechanism," since that's frequently where the clog actually is. Put it back together and run the faucet to check before moving on.

If that didn't fix it, try a plunger

With the overflow plate back on and the drain cover in place, a plunger is the next thing to try. Roto-Rooter describes the technique as using "a lot of force, creating a lot of pressure that can help dislodge the clog."

This won't work on every clog. Roto-Rooter is upfront that plungers only clear certain kinds of blockages, so if the water still isn't moving, it's time for the next step rather than plunging over and over.

Snaking past the trap

If hair at the overflow plate wasn't the problem and a plunger didn't move it, the clog is further down than you can reach by hand. Remove the overflow plate again, since that is where a tub snake usually goes in.

Roto-Rooter's steps: feed the snake wire in and "crank out about 30 inches of wire," then keep cranking and pressing forward until you feel it meet the obstruction, twist the handle to work the cable into the clog, then crank it back out along with whatever it caught.

When to stop and call

If the drain still won't move after checking the overflow plate, plunging and snaking, or if other drains in the house are slow at the same time, the problem is likely past what these steps can reach.

Call to get connected with a local plumber who serves Eden Prairie if the tub is still completely stopped after trying the steps above.

Common questions

What usually causes a bathtub to stop draining completely?

Hair is the most common cause, according to Roto-Rooter, usually caught on the stopper mechanism behind the overflow plate or further down the drain. Soap buildup around the same hair often makes the clog worse over time.

Should I remove the overflow plate myself?

It's a standard first step. Unscrew the plate, keep the screws away from the drain opening, and pull the stopper out with it to check for hair and soap on the mechanism before trying anything else.

Why didn't plunging clear my tub drain?

Roto-Rooter notes that plungers only work on certain clogs. A plunger relies on pressure reaching the blockage directly, so a clog that is further down the line than the plunger's reach, or one that is packed tightly, often needs a snake instead.

How far into the drain do I need to snake a bathtub?

Roto-Rooter's own instructions have you crank out roughly 30 inches of wire before you typically reach the clog, continuing to feed and twist until you feel the snake meet the obstruction.

Sources

Roto-Rooter: Three Ways to Clear a Clogged Bathtub Drain (overflow plate, plunger technique, snaking method)
Build.com: Tub Waste and Overflow Guide (trip lever and plunger assembly hidden in the overflow pipe)

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