How to unblock a U bend under the sink


Slow water drainage can be caused by a build-up of grease, hair or soap in the U-bend under the sink. If the pipe isn’t totally blocked, try a homemade drain cleaner of half a cup of bi-carb soda, a cup of white vinegar and four litres of boiling water. Pour down the drain and repeat if necessary. It should take care of any greasy build-up, but solid blockages need to be removed using these steps. –

Use a plunger - If water is backed up into the basin, bail it out until there’s just enough to cover the plunger cup. Place the plunger cup over the drain and pump vigorously, straight up and down, for at least a minute to remove small blockages. - See more at:

Dismantle the U-bend - If the sink remains blocked, place a bucket under the U-bend. Wrap masking tape around the nuts on both sides of the U-bend and loosen with a pair of large multigrips. Remove the U-bend and pour excess water into the bucket. - See more at:

Reassemble the U-bend - Use a coathanger to remove the blockage and scrape gunk from the U-bend. Clean thoroughly with detergent and a bottlebrush. Smear petroleum jelly around threads of the screw before replacing to make removal easier next time. - See more at:


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