Last updated on November 11, 2026 by Emma Collins
Water pooling around your feet in the shower usually means one thing: hair and soap scum have built up in the drain. Most slow shower drains are a simple blockage close to the surface, and you can usually clear one yourself in under half an hour, with no chemicals at all. Standing water also raises humidity, which can lead to black mould on the bathroom ceiling. Work through the methods below in order, starting with the hair.
Table of Contents
Why Does a Shower Drain Block?
The main cause of a blocked shower drain is hair. Every shower washes loose hairs down the drain, and they tangle together into a mat that traps everything else. Soap scum sticks to that mat and makes it thicker, and over time the water slows to a trickle. Limescale adds to the problem in hard water areas, which cover much of England. It builds up inside the pipe and narrows it, so even a small amount of hair can block the flow. Limescale is the same chalky build-up that furs up kettles — see how to descale a kettle. The same scale also builds up in toilets — our guide to removing limescale from a toilet covers that job. Small objects can also cause a blockage, such as a bottle cap, a cotton bud, or a piece of a sponge. A drain that suddenly blocks completely, or that gurgles and smells, may have a deeper problem further down the pipe. Most slow drains, though, are a simple hair blockage close to the surface, and that is easy to fix.
What You Need to Unblock a Shower Drain
You do not need special equipment. You will need:
- Rubber gloves, an old towel and a bucket
- A drain snake, a plastic drain stick or long tweezers
- A standard cup plunger
- Baking soda, white vinegar and hot (not boiling) water
- A plastic bag for the mess
Drain sticks are cheap and widely available in UK supermarkets and DIY shops for a few pounds.
A cup plunger is the kind with a rubber cup, not a flange plunger made for toilets. It is useful if the blockage is further down the pipe.
Wear old clothes. Drain blockages are unpleasant, and the smell can be strong. Open the bathroom window before you start.
How to Unblock a Shower Drain Without Chemicals: Step by Step
Try the methods in this order — each one deals with a different part of the blockage, and most slow drains clear at the first or second step.
| Method | What it clears | Try it when |
|---|---|---|
| Pull out by hand or with tweezers | Hair near the surface | Water drains slowly and you can see the blockage |
| Drain snake or drain stick | Hair and soap deeper down | Hand removal did not clear it |
| Cup plunger | A blockage further down the pipe | The drain is still slow after the snake |
| Baking soda and vinegar, then hot water | Soap scum and grime on the pipe walls | After the hair is out, as a finishing clean |
Start by removing the drain cover. Most shower drain covers lift off or unscrew. Shine a torch down the drain and look for the blockage. In most cases, you will see a clump of hair just below the surface. Put your gloves on and pull out as much as you can by hand or with tweezers. Then push a drain snake or drain stick down the pipe, twist it gently, and pull it back out. It will bring up a tangled mass of hair and soap. Repeat until the stick comes out clean. If the water still drains slowly, try the plunger. Put enough water in the shower tray to cover the rubber cup, press the plunger firmly over the drain, and push up and down for 15 to 20 seconds. The pressure should push the remaining blockage through. Next, pour half a cup of baking soda down the drain, followed by half a cup of white vinegar. Leave it to fizz for 15 minutes, then flush it with hot tap water — not boiling water, which can soften plastic pipes and weaken the seals and joints. Repeat the hot water flush twice. Run the shower and check the flow. If the water drains quickly, the job is done.
How to Use a Drain Snake Safely
A drain snake is a long, flexible tool with a small hook or bristles at the end, and it is the best tool for a stubborn blockage. Feed it slowly down the drain, turning the handle as you go. Do not force it. If you feel resistance, that is the blockage, so twist gently to catch it, then pull the snake back out slowly. Clean the snake after each use and put the mess straight into a plastic bag. Wash your hands well, even though you wore gloves. A drain snake can scratch the inside of plastic pipes if you push it hard, so use gentle pressure and let the tool do the work. If the snake will not go any further, or if you feel it hit something solid that will not move, stop. That could be a broken pipe or a solid object, and forcing it can cause damage. That is the point to call a plumber — the Chartered Institute of Plumbing and Heating Engineering can help you find a qualified plumber.
Why Baking Soda and Vinegar Works (and Its Limits)
Baking soda and vinegar are the most popular natural drain cleaner, and they do help, but it is worth knowing what they actually do. When the two mix, they fizz and create carbon dioxide gas. That fizzing loosens soap scum and grime on the walls of the pipe, and the hot water afterwards flushes it away. What the mixture cannot do is dissolve a solid clump of hair. Hair is the main cause of most shower blockages, and it has to be pulled out physically. That is why baking soda and vinegar works best after you have removed the hair, as a finishing clean rather than a first step. If you have already pulled out the hair and the drain is still slow, the problem may be limescale or a blockage further down the pipe. In that case, repeat the baking soda and vinegar treatment, or try the plunger again. If nothing works, the blockage may be beyond the shower trap, and a plumber will need to open it up.
How to Stop Your Shower Drain Blocking Again
Prevention is much easier than unblocking. Fit a hair catcher over the drain. These cost a few pounds from a supermarket or DIY shop, and they catch most hair before it goes down the pipe. Empty the catcher after every shower, or at least once a week. Once a week, run hot water down the drain for a minute to wash away soap scum before it builds up. Once a month, do the baking soda and vinegar flush as a routine clean, even when the drain seems fine. Avoid letting anything else go down the shower drain. Do not rinse paint, plaster or grout in the shower, and keep cotton buds and wipes out of the drain. They do not break down and they cause blockages that are much harder to clear.
Frequently Asked Questions
Can I use bleach to unblock a shower drain?
Bleach can damage seals and should never be mixed with other cleaners. The manual methods above are safer.
How often should I clean my shower drain?
Do a hot water flush once a week and a baking soda and vinegar clean once a month, even when it drains fine.
Why does my shower drain smell?
Trapped hair and soap scum breed bacteria. Pull out the blockage and flush the drain, and the smell should go.
Conclusion
Most slow shower drains are just hair and soap scum close to the surface. Pull the hair out first, then work through the snake, the plunger and the baking soda flush in that order — and use hot tap water for the flush, not boiling water. Fit a hair catcher and run hot water down the drain once a week, and you should not need to do it again for a long time. If the water still will not drain, or the blockage keeps coming back, call a plumber rather than pouring chemicals down the pipe.
Emma Collins is the editor of The Homely Way, a UK home and lifestyle magazine. She writes practical, plain-English guides on home improvement, cleaning, heating and saving money around the home — always with UK prices, UK products and real-world costs, and no jargon. When she is not writing, she is planning the next guide.
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