Blocked bath drain
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Most likely cause & what to check
Remove the overflow plate and the drain cover — the overflow plate is on the side of the bath near the top, usually held by one or two screws.
Pull out the pop-up plug mechanism if fitted — this is the most common cause as hair wraps around it. Clean off all hair and soap scum.
If the drain is still slow, pour boiling water down in stages — half a kettle at a time. Follow with a squirt of washing-up liquid.
Use drain unblocker gel if the above doesn't work — follow the manufacturer's instructions and flush with hot water after.
For stubborn blockages, use a small drain snake or flexible drain cleaning tool to physically break up or retrieve the blockage further down the pipe.
Refit the overflow plate and test the bath drains freely.
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Frequently asked questions
Can I use a plunger on a bath drain?
Yes — cover the overflow hole with a wet cloth first to create suction, then plunge over the drain opening.