Shower drain blocked? Hair, soap scum, and build-up are usually the cause. Here's how to clear it yourself — and when to call a plumber.
Diagnose Your ProblemA blocked shower drain is one of the most common household plumbing issues and is almost always caused by a build-up of hair, soap scum, and skin cells accumulating in and around the drain opening. In a household with multiple users, hair catches on the drain grate or just inside the drain pipe and creates a mesh that traps further debris, progressively restricting water flow until the shower floor floods during use.
The good news is that most shower drain blockages are close to the surface — in the drain fitting itself or within the first 30–50cm of drain pipe. This makes shower drain blockages among the easiest plumbing problems to resolve without professional help, provided the right tools and approach are used.
In South African homes with tiled shower enclosures (very common across all suburbs), the drain fitting is typically a chrome grate set flush with the tile surface. These grates are usually removable and the hair build-up underneath is directly accessible. Regular monthly cleaning of the drain grate prevents most shower drain blockages from developing in the first place.
Long or thick hair creates the worst shower drain blockages — a single shower from someone with long hair can deposit enough hair to begin a build-up. Fitting a drain hair catcher (a fine mesh grate insert available at any hardware store) is the single most effective prevention measure and costs less than R50. It removes the dominant cause of shower drain blockages entirely.
Need a qualified plumber? Fonster connects you with vetted plumbers in your area.
A slow-draining shower is low to medium urgency — it is a nuisance and will worsen, but it is unlikely to cause property damage as long as the shower water doesn't regularly overflow the tray or wet area and reach the adjacent floor. Clear it within a few days.
If shower water is overflowing the drain tray or shower step into the bathroom, it becomes higher urgency as sustained water exposure damages grout, weakens tile adhesive, and can get under tiles to damage the substrate and subfloor. Address it within 24 hours if this is happening.
The signs you notice at home can help determine how serious the issue is and how quickly a professional should attend.
This usually indicates:
Hair and soap scum build-up at or just below the drain grate — partial blockage that can likely be cleared manually
Urgency: Medium
Recommended action:
Remove the drain grate and pull out visible hair. Use a zip-it tool to reach deeper. Flush with hot water. Install a drain hair catcher to prevent recurrence.
This usually indicates:
Blockage in the horizontal outlet pipe beyond the drain fitting — soap scum and hair plug forming deeper in the pipe
Urgency: High
Recommended action:
Book a plumber to clear the drain with a snake or mini-machine. Avoid using the shower until cleared to prevent overflow damaging tile grout and subfloor.
This usually indicates:
Complete blockage in the shower drain or shared bathroom drain branch — drainage completely stopped, overflow causing floor damage
Urgency: Emergency
Recommended action:
Stop using the shower immediately. Call a plumber today for same-day clearing. Clean up overflow water from bathroom floor to prevent tile and subfloor damage while waiting.
Shower drain blockages are very DIY-friendly. Start by removing the drain grate and manually pulling out any visible hair. A long-handled drain snake or zip-it tool (a flexible plastic strip with barbs, available at hardware stores for under R50) can reach hair clumps further down the drain. Pour very hot (not boiling) water down the drain after clearing to dissolve soap residue.
If you can't clear the blockage manually, or if the shower is sharing a drain branch with other fixtures that are also backing up, call a plumber. A plumber with a drain machine can clear a stubborn shower drain in under 30 minutes. For recurring blockages in the same shower, the plumber can check whether the drain pipe gradient and diameter are correct.
The plumber will first check whether the blockage is in the drain fitting, in the horizontal outlet pipe, or in a shared drain branch. For a simple hair blockage, a small drain snake will locate and remove the obstruction in a few minutes. For a deeper or more substantial blockage, a powered mini-machine is used.
If the shower drain blocks repeatedly despite regular cleaning, the plumber will investigate the pipe gradient and diameter — a horizontal shower drain with insufficient fall will always accumulate debris. If the pipe grade is wrong, re-routing or re-grading the outlet pipe is the permanent fix. For shower drains in tiled shower enclosures, the plumber will use camera equipment to inspect the pipe without breaking tiles.
A blocked shower drain that causes regular flooding of the shower tray leads to water pushing under the tile edges and grout lines. Over time, this saturates the screed or tile bedding, causing tiles to debond and lift — a repair that requires retiling the entire shower area, which is expensive and time-consuming. Sustained moisture under shower tiles also promotes black mould growth at grout lines.
If shower overflow reaches the main bathroom floor and sits against the base of the toilet, vanity, or wall panels, it can cause MDF and chipboard to swell, damage floor coverings, and promote mould in the wall bases. Addressing shower drain blockages early — before overflow becomes routine — prevents all of this secondary damage.
Hair is the main culprit - it combines with soap residue to form solid clogs. Long hair households experience faster blockages. The shower trap catches hair which builds up over time.
You can try removing the drain cover and pulling out visible hair. For deeper blockages, professional clearing is safer and more effective than chemical cleaners which can damage pipes.
Install a hair catcher over the drain, remove and clean it weekly, never let hair go down the drain, flush with hot water after each shower, and use enzyme cleaners monthly to break down buildup.
We use specialized drain augers for shower drains and high-pressure water jetting for stubborn blockages. This completely clears the pipe without harsh chemicals or damage.
Yes, standing water promotes mould and bacteria growth, can overflow and damage floors, creates slip hazards, and the stagnant water smells unpleasant. Regular clearing prevents these issues.
Select your area to find local professionals who can help with this specific problem.
Get local plumber help for Shower Drain Blocked in Stellenbosch
Find Help in StellenboschGet local plumber help for Shower Drain Blocked in Somerset West
Find Help in Somerset WestGet local plumber help for Shower Drain Blocked in Gordon's Bay
Find Help in Gordon's Bay