The short answer
Most shower drains block with hair bound together by soap scum, so the first step is to pull the clog out. Remove the drain cover or grate, then use a bent wire, a hooked plastic drain tool, or long-nose pliers to hook out the matted hair, which usually sits just below the surface. If the blockage is deeper, plunge the drain with a cup plunger, or clear the shower trap if it is accessible. A baking soda and vinegar flush helps shift residual soap scum and odour. Fit a hair catcher afterwards to stop it recurring.
Slow-draining showers are almost always caused by hair and soap. Once you know where the clog sits, clearing it is usually quick and tool-light.
At a glance
- Main causeHair bound by soap scum
- First stepHook out the hair clog
- ToolsBent wire, hook tool, pliers
- If deeperPlunge or clear the trap
- PreventionFit a hair catcher over the drain
Step 1: Remove the cover and hook out the hair
Shower drains block differently from sinks. The culprit is nearly always hair, which knots together and is held in place by soap scum, shampoo residue and grease. The good news is that the clog usually sits within reach just below the grate.
- Lift or unscrew the drain cover or grate. Some lift straight out; others have a small screw.
- Shine a torch down to see the clog. Then use a hooked tool to pull it out: a wire coat hanger bent into a hook, a cheap plastic barbed drain tool (sold in DIY stores), or long-nose pliers.
- Feed the hook past the hair, twist, and pull the matted clump out. Be prepared for an unpleasant mass of hair and grey scum.
- Repeat until no more comes up, then run the shower to test the flow.
Step 2: Plunge or clear the trap if it is deeper
If hooking out the visible hair does not fully clear it, the blockage is further down. Two approaches help.
| Method | How to do it | When to use |
|---|---|---|
| Cup plunger | Cover the drain, add a little water, pump firmly | Blockage just out of reach |
| Shower trap clean | Access and unscrew the trap, clear by hand | If the trap is reachable |
| Drain snake / auger | Feed in, twist to grab hair, pull out | Deeper hair clogs |
| Baking soda + vinegar | Pour both, wait, flush with hot water | Residual scum and smell |
Matching the method to how deep the blockage sits. For guidance only.
Step 3: Flush, finish and prevent
Once the clog is out, clear any remaining soap scum with a home flush: pour a few tablespoons of baking soda down the drain, follow with white vinegar, leave the fizz to work for 10 to 15 minutes, then rinse with hot, not boiling, water. This loosens greasy residue and helps with odours. Avoid boiling water on plastic shower traps, as it can distort them.
Refit the drain cover, then prevent the problem returning by fitting a hair catcher or strainer over the plughole; it costs very little and stops most hair entering the drain. Empty it regularly. Brushing hair before showering and wiping loose hair from the tray also reduce what goes down.
If the shower still drains slowly after the trap and hair are clear, the blockage may be in the waste pipe shared with other fixtures, or in the underground drain. If other fixtures are slow too, treat it as a shared drain blockage that may need rodding from a chamber or a drainage engineer rather than a local shower-trap fix.
Reaching deeper clogs and dealing with the trap
When hooking out the visible hair is not enough, a flexible drain snake is the most effective next step for a shower. Fed down past the grate, its tip works around the bend and grabs the matted hair that has built up just out of reach, letting you draw the whole clump back out. Turning the snake gently as you push and pull helps it bite into the hair rather than simply compacting it further down the pipe.
The shower trap is the other place clogs gather. On some showers, particularly those with a removable bottle trap or an accessible trap beneath a raised tray or in a void below, you can unscrew it, tip out the hair and scum, rinse it and refit it. On others the trap is sealed beneath the tray and not reachable without lifting it, which is a bigger job better suited to a professional. If your shower sits over a bath, clearing the bath trap may also help, as they often share waste pipework.
If the shower is still slow once the visible hair, snake-reachable clog and accessible trap are all clear, the obstruction lies in the waste pipe beyond, possibly in a run shared with the bath, basin or an underground drain. Check whether other fixtures are draining slowly at the same time: if they are, the problem is a shared blockage that needs rodding from an inspection chamber or a drainage engineer, not another go at the shower plughole.
It is also worth ruling out a couple of look-alike problems. A shower that drains adequately but smells often has a fouled or dried-out trap rather than a blockage; cleaning the trap and running water to refill the seal usually cures it. A shower tray that holds a shallow pool of water even when the drain is clear may simply be sitting slightly out of level, so the water cannot reach the outlet, which is a tray-fitting issue rather than a drainage one. Distinguishing these saves effort spent fighting a blockage that is not there.
Frequently asked questions
Can I use chemical drain cleaner on a shower drain?
You can, but hair-and-soap clogs respond poorly to chemicals and far better to physically hooking the hair out. If you do use a caustic cleaner, follow the safety instructions, wear gloves and eye protection, and never use it right before plunging.
Why does my shower drain smell?
A smell usually comes from soap scum, hair and grease decomposing in the trap, or from a dried-out trap letting sewer gas up. Cleaning the trap and running water to refill the seal usually cures it.
What is the best way to stop a shower drain blocking?
Fit a hair catcher over the plughole and empty it regularly. This stops the hair that causes nearly all shower blockages from entering the drain, and is the simplest long-term prevention.
Sources & further reading
Figures on this page are typical UK ranges drawn from published cost guides and are intended as guidance, not a quotation.