(Don’t Forget to Plug the Overflow!)
A blocked sink is one of the most common plumbing issues in homes across the UK.
Hair, grease, food waste, and soap residue can build up inside the waste pipe and eventually stop water from draining properly.
Before reaching for chemical drain cleaners, try a simple and effective solution: using a plunger correctly.
Why Covering the Overflow Matters
Most sinks have a small hole near the top called the overflow. When plunging a sink, air escapes through this hole, which reduces the pressure needed to clear the blockage.
Covering the overflow helps create a proper seal so the plunger can push and pull water through the pipe effectively.
Step-by-Step Guide
If the blockage loosens, hot water can help flush the remaining debris away.
When the Blockage Won’t Clear
If plunging doesn’t work, the blockage could be deeper in the waste pipe or in the trap beneath the sink.
At Plumbing on Demand, we deal with stubborn sink blockages quickly using professional tools and safe methods to restore normal drainage without damaging your pipes.
To unblock a sink with a plunger, create an airtight seal by covering the overflow hole with a damp cloth and positioning a cup-style plunger over the drain. Fill the basin with enough water to cover the cup, then plunge vigorously up and down 10–15 times to dislodge the clog.
If this doesn’t work, or if you are not confident doing this, call us at Plumbing on Demand for step-by-step advice or further assistance.
Adam Goldman of Plumbing on Demand is highly recommended by his clients. He specialises in all kinds of plumbing, heating and gas issues.
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