How to Unblock a Drain: Methods from Simple to Serious

When Water Won't Go Down

Blocked drains are one of the most common household problems. Before calling a plumber, there's plenty you can try yourself. Here's the full toolkit of drain-clearing methods, from simple to serious.

Identify the Blockage

Signs and what they mean:

• Single fixture slow: blockage in that trap or waste
• Multiple fixtures: blockage in shared drain
• All fixtures: main drain blockage
• Gurgling from other fixtures when you empty one: ventilation issue or partial blockage

Method 1: Boiling Water

For minor blockages, especially grease:

1. Boil kettle
2. Pour directly down plughole in stages
3. Let hot water work for few seconds between pours
4. Run tap to check flow

When it works: Grease and soap buildup

Caution: Don't use on PVC pipes in older properties - can soften joints

Method 2: Plunger

The classic approach:

1. Block overflow hole with wet cloth
2. Cover plughole completely with plunger
3. Fill basin with enough water to cover plunger cup
4. Pump vigorously 15-20 times
5. Pull plunger off sharply - creates suction
6. Repeat several times

Tips:

• Petroleum jelly on plunger rim improves seal
• Cup plungers for sinks, flange plungers for toilets
• Patience matters - may take several attempts

Method 3: Chemical Drain Cleaners

Use with caution:

• Follow instructions exactly
• Ensure ventilation
• Never mix products
• Protect eyes and skin
• Don't use if drain is completely blocked (chemicals just sit there)

Natural alternative:

• Pour half cup bicarbonate of soda down drain
• Follow with half cup vinegar
• Cover and wait 15-30 minutes
• Flush with hot water

Method 4: Clean the Trap

For sink and basin blockages:

1. Place bucket under trap
2. Unscrew trap access (bottom of U-bend) or remove entire trap
3. Let water drain into bucket
4. Clear debris from trap
5. Check pipe above and below trap
6. Reassemble and test

Tips:

• Traps collect hair, soap, and gunk
• Clean regularly to prevent blockages
• Replace worn washers while you're there

Method 5: Drain Snake/Auger

For blockages further down:

1. Remove trap or access cleaning eye
2. Feed snake into pipe
3. Rotate handle to work through blockage
4. Push through and pull back several times
5. Retrieve snake and debris
6. Flush with water

Drain snakes available in our hand tools range.

Method 6: Wet Vacuum

If you have a wet/dry vacuum:

1. Set to wet mode
2. Create tight seal over plughole
3. Use maximum suction
4. Can pull blockages back out

Toilet-Specific Techniques

Toilet plunging:

• Use flange plunger (the one with the extended lip)
• Ensure plunger is submerged
• Push and pull to create pressure
• May take several minutes

Toilet auger:

• Specifically designed for toilets
• Protected end won't scratch porcelain
• Reaches further than plunger can

Outside Drain Blockages

For gully and drain blockages:

• Remove grate and clear visible debris
• Use drain rods for further blockages
• Always turn rods clockwise (prevents unscrewing)
• Work systematically towards main drain

When to Call a Professional

• Main drain blockage affecting whole house
• Repeated blockages despite clearing
• Sewage backing up
• Multiple properties affected (council responsibility)
• Suspected root ingress or pipe collapse
• You've tried everything and it's still blocked

Prevention

• Use drain covers to catch hair
• Don't pour grease down drains - bin it
• Run hot water after washing up
• Monthly baking soda and vinegar treatment
• Keep drain covers clear of leaves
• Only flush toilet paper - nothing else

The Bottom Line

Most drain blockages are clearable with basic tools and techniques. Start simple, work up to more serious methods. Prevention is better than cure - a few minutes of maintenance saves hours of clearing blockages. Know when to call a professional though - some blockages need proper equipment and expertise.