Slow draining sink or bath
✅Free DIY guide — no sign-up required. Written by a qualified Gas Safe engineer.
DIY Friendly💷 £0–£30⏱ 15–30 min
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Most likely cause & what to check
1
Remove and clean the drain cover — hair and soap build-up is the most common cause.
2
Pour boiling water down the drain in three stages.
3
Try baking soda and white vinegar: pour half a cup of each, cover, wait 20 minutes, flush with hot water.
4
Use a plunger firmly 10–15 times.
5
For persistent blockages, use a flexible drain snake.
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