Domakihub How to Unblock a Shower Drain Without Calling a Plumber
Five proven steps to clear a blocked shower drain using tools you already have at home.
Reviewed by Domakihub cleaning pros · 2026-06-23 · 4 min read
A slow or standing shower drain is one of the most common maintenance issues in Greek homes, holiday rentals, and hotel rooms — and in most cases you can fix it yourself in under thirty minutes without any specialist equipment. The video above from master plumber Roger Wakefield walks through the process visually; this guide gives you the same steps in writing so you can work through them methodically. Whether you manage a single bathroom or a portfolio of short-term rentals, keeping drains clear prevents water damage, bad odours, and costly emergency call-outs.
Why Shower Drains Block So Quickly
Hair is the primary culprit in almost every shower drain blockage. Each shower washes loose strands down the drain where they catch on the drain edges, tangle together, and form a mat that traps soap scum, conditioner residue, and mineral deposits from hard water. Over a few weeks this mat grows dense enough to slow drainage noticeably.
In Greece, the hard water found in most of the country accelerates the process because limescale bonds to hair and soap, making the blockage heavier and stickier than it would be in a soft-water area. Rentals and hotel bathrooms are especially vulnerable because they see more guests, more hair types, and less consistent cleaning than a private home.
What You Will Need
For most blockages you need nothing more than a pair of rubber gloves, a wire coat hanger or a purpose-made plastic drain hook (available at any hardware shop for under two euros), a kettle, and the baking soda and white vinegar that are staples in any Greek household. A cup plunger and a small torch are useful additions. Chemical drain cleaners are a last resort — they can damage older pipe seals and should never be used in properties with septic tanks, which are common in rural Greek holiday rentals.
5 Steps to Unblock a Shower Drain
- 1
Remove the drain cover and pull out visible debris
Put on rubber gloves and lift or unscrew the drain cover. Most Greek-market shower trays use a simple snap-fit or single-screw cover that comes off easily. Reach in with your fingers or a hooked wire and pull out as much hair and gunk as you can see. This single step clears a large proportion of blockages entirely and costs nothing.
- 2
Pour boiling water down the drain in stages
Boil a full kettle and pour it slowly down the drain in three separate pours, waiting about thirty seconds between each. The heat melts soap and conditioner residue that binds the remaining hair together, and the flush carries loosened material further down the pipe. Do not use boiling water if you have PVC push-fit fittings closer than a metre from the drain — use very hot tap water instead.
- 3
Apply the baking soda and vinegar treatment
Pour 80 g (roughly a third of a cup) of bicarbonate of soda directly into the drain opening, followed immediately by 120 ml of white vinegar. The fizzing reaction breaks down organic build-up and deodorises at the same time. Cover the opening with the drain cover or a cloth for five minutes to keep the reaction concentrated in the pipe, then flush with another kettle of hot water.
- 4
Use a drain hook or improvised snake for deep hair clogs
If water still drains slowly, straighten a wire coat hanger and bend a small hook at one end, or use a purpose-made plastic drain snake. Feed it gently into the drain opening, rotate it slowly, and pull it back out — you will usually bring with it a clump of hair and residue. Repeat two or three times until the tool comes out clean. Dispose of the debris in the bin, not back down the drain.
- 5
Plunge and do a final hot-water flush
Place a cup plunger over the drain opening, ensuring a firm seal, and push down and pull up sharply ten to fifteen times. This dislodges any material stuck further along the trap or waste pipe. Finish with a slow pour of hot water and watch the drain: if it empties in under ten seconds the blockage is cleared. If water still pools, the obstruction may be in the main stack or soil pipe and it is time to call a plumber.
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FAQ
- How often should I clean my shower drain to prevent blockages?
- In a family home or private rental, remove visible hair after every shower and do a full baking-soda-and-vinegar flush once a month. In a holiday rental or hotel room that sees frequent changeovers, clean the drain cover and hook out any hair between every guest stay — it takes two minutes and prevents the kind of blockage that causes guest complaints.
- Is it safe to use chemical drain unblockers in a Greek property with a septic tank?
- No. Strong chemical drain cleaners (those based on sodium hydroxide or sulphuric acid) kill the beneficial bacteria in a septic tank that break down waste. If your property is on a septic system — common in rural areas and island properties throughout Greece — stick to the mechanical methods (hook and plunger) and the baking soda and vinegar approach, which are tank-safe.
- The drain is clear but there is still a bad smell — what is causing it?
- The smell usually comes from a dry trap rather than a residual blockage. The P-trap under the shower floor holds a small pool of water that acts as a seal against sewer gases; if the shower has not been used for a while (common in seasonal holiday rentals), that water evaporates. Run the shower for thirty seconds to refill the trap. If the smell persists after the trap is wet, pour a cup of water mixed with a tablespoon of bleach down the drain to sanitise the pipe walls.