Unblocking a kitchen sink
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Most likely cause & what to check
Start with a plunger — cover the overflow with a damp cloth to create suction, then plunge vigorously 10–15 times.
If that doesn't work: put a bucket under the U-bend (the curved pipe under the sink), unscrew the U-bend by hand or with grips, and clear the blockage directly.
For a grease blockage, pour a full kettle of boiling water down the drain followed by a cup of bicarbonate of soda and a cup of white vinegar. Leave 20 minutes then flush.
If the blockage is deeper, use a drain snake — insert it through the U-bend opening and work it through until you clear the obstruction.
To prevent recurrence: fit a sink strainer to catch food debris, and pour boiling water down the drain weekly.
🛠 Tools & materials you may need
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