You lifted the grate, pulled out something unpleasant, ran the water, and it is still pooling around your feet. So the hair was not the problem, or at least not all of it.
Hair is what you can see. It is rarely what is holding the blockage together. Hair on its own washes through a waste pipe perfectly well. What stops it is the film already coating the inside of the pipe, and until that film goes, every shower you take adds to the mass again.
What Is Actually Down There in a Shower Waste
A bathroom waste pipe accumulates a soft, greasy layer on its internal wall over years. It comes from everything that goes down a shower other than water: body oils, soap residue, shampoo and conditioner, shaving cream, exfoliant grit, and the fine sand and grit that comes off feet.
That layer is sticky. Hair passing through catches on it rather than flowing past, and once a few strands anchor, every subsequent strand catches on those. The result is a mat that grows outward from the pipe wall until the opening is small enough to notice.
Which explains the thing that puzzles people most: you can remove a genuinely horrifying amount of hair, get decent drainage back for a fortnight, and then find it slowing again. You removed the mat. The surface that caught it is still there, waiting.
First Question: Is It Just the Shower, or the Whole Bathroom?
This matters more than anything else on the page, because it decides whether you are dealing with a trap or a drain line.
A bathroom is usually a group. The shower, basin, bath and often a floor waste all feed into one branch line before it joins the main drain. So watch what the others do while the shower is draining slowly.
- Only the shower is slow; everything else is fine. The blockage is in the shower’s own waste and trap. This is the common case and the most fixable.
- The basin or bath is slow as well. The restriction is further along, in the branch the bathroom shares. Clearing one fixture will not solve it.
- Water rises in the shower when you flush the toilet, or the drain gurgles when another fixture empties. That is air being pushed back through the nearest opening, which means the problem is beyond the bathroom entirely, in the main line.
- Anything is coming up rather than going down. Stop using water in the house and treat it as urgent. Sewage coming up through the shower covers why, and why the shower is usually where it appears.
Worth knowing why the shower is so often the first to complain: the floor waste or shower grate is typically the lowest opening in the house. When anything backs up anywhere in the system, that is where it surfaces. A slow shower is sometimes a bathroom problem and sometimes an early warning about the whole drain.
Older Melbourne Bathrooms Have a Head Start on This
Two things make this more common in older housing stock, which covers a great deal of suburban Melbourne.
The first is gradient. Waste pipes rely on fall to carry solids along rather than letting them settle. In older homes, particularly where a bathroom has been renovated around existing pipework or an extension has lengthened a run, the fall can be shallower than ideal. Water still drains, but it moves slowly enough that residue settles instead of being carried away, so the film builds faster.
The second is the pipe itself. Decades-old waste lines are rougher internally than modern PVC, and a rough surface gives that film something to grip. The same shower habits in a twenty-year-old house and a sixty-year-old house do not produce the same result.
A Smell Is Not the Same as a Blockage
If the issue is a bad smell from a bathroom drain that is otherwise draining fine, that is usually a dry trap rather than a blockage. Every waste has a water seal in its trap that stops drain air from coming back up. In a spare bathroom, a holiday house, or a rarely used floor waste, that water evaporates and the seal is lost. Pour a bucket of water down it and wait a few hours. If the smell goes, that was it, and nothing needed clearing at all.
What to Try, and What Not to
Two things are worth doing yourself.
- Clear the grate and the trap properly. Lift the grate if it comes out, and remove what you can reach. A plastic drain-clearing strip with barbs along its length is better than a hooked wire, because it grabs the mat rather than pushing it further in.
- Flush it with hot water afterwards. Hot, not boiling, and plenty of it. This softens and moves some of the surface film rather than just the hair. It is the step most people skip, and it is the one that actually addresses the cause.
What not to do:
- Caustic drain cleaner. It is formulated for organic build-up in a sink; it generates heat in a confined waste; it can damage older pipework and chrome grates, and it does nothing to a mat that has already compacted. It also leaves a waste full of caustic liquid for whoever works on it next. We see the aftermath often enough to have written about it: tried Drano, a plunger and a drain snake, and it is still blocked.
- Forcing a wire coat hanger down. It scratches the waste, tends to compact the mat rather than retrieve it, and in a shower it can damage the trap or dislodge a puddle flange seal, which turns a slow drain into a leak under the floor.
Cleared the Hair and It’s Still Slow?
Tell us which fixtures are affected, whether anything gurgles when the toilet flushes, and how long it has been building. Those three answers usually tell us whether this is the trap, the bathroom branch or the main line before we arrive. Available 24/7 across Melbourne, no call-out fee, quoted before we start.
What a Plumber Does Differently
The difference is not a bigger tool. It is treating the pipe wall rather than the mat.
Clearing the hair restores flow through the opening. High-pressure water jetting scours the film off the full internal diameter of the waste, so the surface that was catching everything is gone and the pipe is back to its original bore. That is why a proper clean holds for a year, whereas pulling the hair out holds for weeks.
If the shower has blocked more than once, the useful question stops being how to clear it and becomes why it keeps happening. A camera inspection shows whether it is simply accumulated film, a section with inadequate fall, or damage in the line. The first is a cleaning job. The second and third are not, and no amount of clearing changes them.
Keeping It Clear After It Is Fixed
- Fit a hair catcher over the waste. The single most effective thing on this list, and it costs almost nothing. Emptying it is unpleasant for ten seconds a week and saves the alternative.
- Run the hot tap into the shower waste for thirty seconds once a week. Hot water carries the day’s oils and soap residue through instead of leaving them to set.
- Keep bath bombs, exfoliating scrubs and hair clippings out of the drain. Grit and glitter do not break down, and they give the film something to build around.
- Pour a bucket of water down any unused floor waste monthly. Keeps the trap seal intact and prevents the smell.
If it comes back within weeks despite all of that, the cause is in the pipe rather than in the habits, and that is worth looking at properly rather than repeating the clear. The same pattern shows up across kitchens and bathrooms for different reasons, which we compare in kitchen versus bathroom drain blockages.
Frequently Asked Questions
Why is my shower still slow after I removed all the hair?
Because the hair was caught by a film of soap residue and body oils coating the pipe wall, and that film is still there. Removing the mat restores some flow briefly, then new hair catches on the same surface. Clearing the film rather than the hair is what makes it last.
Is it normal for a shower to drain slowly?
No. A shower waste should clear roughly as fast as the water arrives, with no pooling around your feet. Standing water means the opening is already partly restricted, and partial restrictions become complete ones. It is easier to deal with while it is still an annoyance.
Why does my shower gurgle when I flush the toilet?
Because air is being displaced through the nearest available opening, which is usually the shower waste. That means the restriction is downstream of both fixtures, in the line they share rather than in the shower itself. Clearing the shower waste will not help.
My bathroom drain smells, but water goes down fine. Is it blocked?
Probably not. A smell with normal drainage usually means the trap has dried out and lost its water seal, which is common in spare bathrooms and unused floor wastes. Pour a bucket of water down it and see whether the smell clears. If it does, that was the whole problem.
Can I use drain cleaner in a shower?
We would not. It is made for organic build-up in a sink; it can damage older waste pipes and chrome grates, and it does nothing to a compacted hair mat. If it does not work, you also have a waste full of caustic liquid for whoever opens it next.
How often should a shower drain need clearing?
After a proper clean of the pipe wall rather than just the hair, you should be measuring in years. If yours needs attention every few months, something other than ordinary use is going on: inadequate fall on the waste, a rough or damaged section, or a restriction further along the line. That is worth diagnosing once rather than clearing repeatedly. More on how we approach that on our blocked drains page.
Shower or Bathroom Drain Blocked? We’ll Clear the Pipe, Not Just the Hair
Licensed Victorian plumbers across every Melbourne suburb, available 24/7, with no call-out fee. We clear the waste properly, tell you whether it is the trap, the branch or the main line, and quote a fixed price before we start. See how we handle blocked drains across Melbourne.
