How to Unblock a Shower Drain

A shower drain almost always blocks because hair binds together with soap scum and skin oils to form a solid mat that sits in the trap just below the plughole. Every shower adds a little more hair and a little more scum, so the clog builds gradually until water starts pooling around your feet instead of draining away.

This is different from a kitchen sink blockage, which is more often grease-based, or a toilet blockage, which is usually paper or a foreign object. Shower drains are a hair problem first and a soap problem second — which is why fishing the clog out by hand works far better than pouring a chemical cleaner down the plughole.

It's almost always the trap, not the drain itself — the trap is the U-shaped section directly under the plughole, and it's narrow enough that hair catches there before it ever reaches the wider drain pipe. If water drains slowly, gurgles, or eventually goes down after standing for a minute, the clog is sitting in the trap and you can clear it yourself in minutes using the steps below.

If the shower is completely blocked with standing water that doesn't move at all, if water backs up from the shower when you flush the toilet or run a nearby tap, or if you're getting the same problem across more than one fixture, the blockage has moved past the trap and into the shared drain run. That's a job for a drain survey rather than a plughole clear-out, and pushing harder with a plunger or wire at that point usually just pushes the clog further down.

Clear a hair-and-soap blocked shower drain by removing the trap and physically pulling the clog out — it takes most people under ten minutes and needs no special tools beyond gloves and something to hook the hair out with.

1. Remove the plughole cover. Lift or unscrew the strainer or grille covering the plughole — most just pull straight up, some have a small screw in the centre.
2. Clear visible hair by hand. Pull out any hair and debris sitting just below the cover with gloved fingers or a pair of pliers before going any further.
3. Remove and inspect the trap. Unscrew or lift out the shower trap beneath the plughole — this U-shaped section is where almost all hair and soap clogs actually sit, not further down the pipe.
4. Pull the clog out of the trap. Use a drain cleaning tool, a bent wire coat hanger, or a disposable drain snake to hook out the hair-and-soap mass from inside the trap.
5. Flush the trap with hot water. Run hot water (not boiling, which can damage plastic fittings) through the trap and refit it to confirm the clog has fully cleared.
6. Refit the cover and test. Screw or press the plughole cover back into place, then run the shower for a minute and check the water drains at a normal speed without gurgling.

Do this every few months even before the drain slows down noticeably, and fit a cheap hair strainer over the plughole afterwards — it catches most hair before it ever reaches the trap and cuts how often you need to repeat this job.

Call a plumber when the trap is clear but the shower still won't drain, when the blockage keeps coming back within days of clearing it, or when other drains in the flat are affected at the same time — all signs the clog sits deeper in the shared drainage than a plughole clear-out can reach. RenoPlumb covers blocked drains across London from our Whitechapel, E1 base, including Tower Hamlets, Hackney, Islington, Newham and Southwark, with proper drain rods, jetting equipment and camera surveys for blockages a DIY fix can't shift.

See our blocked drains service for how we clear stubborn or recurring blockages, or call 07460 824073 if you'd rather skip the DIY step altogether.

The cost of unblocking a shower drain depends on whether the clog is a simple trap clear or a deeper blockage in the shared drain run needing rods, jetting or a camera survey. Every job gets a free, no-obligation quote before we start, so you always know the cost upfront regardless of which type of blockage it turns out to be.

For a fuller breakdown of how we price plumbing and drainage work across London, see our pricing page.

Prevent repeat blockages by fitting a hair strainer over the plughole and clearing it weekly — this single habit stops more shower drains from blocking than any chemical treatment. Flushing the trap with hot water once a month also keeps soap scum from building up between clear-outs, and it's worth doing straight after you notice draining has slowed even slightly rather than waiting for a full blockage.

If your drain blocks again within a few weeks despite regular maintenance, that's usually a sign the pipe run itself has a partial obstruction or poor fall, which is worth having checked rather than repeating the same fix every month.

Need this fixed by someone local? See our page for a plumber in Hackney for borough-specific coverage and response times.