How to Fix a Blocked Drain

A blocked drain is one of the most common household problems. In most cases, you can clear it without calling a plumber.

Likely causes

• Hair and soap scum build-up (bathroom)
• Food debris and grease (kitchen)
• Foreign objects dropped into the drain
• Root intrusion in outdoor drains
• Build-up in the U-bend (trap)

Step-by-step fix

1. 1
   Try a plunger first

   Block any overflow holes with a cloth, fill the basin with enough water to cover the plunger cup, and plunge vigorously 10-15 times.

2. 2
   Remove and clean the drain cover

   Many bathroom drains have a pop-up plug or removable cover. Remove it and clear any hair or debris with your fingers or a hooked wire.

3. 3
   Use a drain snake or flexiwire

   A flexible drain rod (£5-15 from B&Q) can break up blockages deeper in the pipe.

4. 4
   Clean the U-bend

   Place a bucket under the U-shaped pipe under the sink. Unscrew the end caps (most are hand-tight) and remove the blockage manually. Refit and test.

5. 5
   Use bicarbonate of soda and vinegar

   Pour half a cup of bicarbonate of soda down the drain, followed by half a cup of white vinegar. Cover and leave for 30 minutes, then flush with hot water.

6. 6
   Use a commercial drain unblocker

   Products like Mr Muscle Power Gel can dissolve organic blockages. Follow the instructions. Avoid very strong acid or caustic unblockers in old pipework.

Frequently asked questions

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