TL;DR: If water is leaking under your sink in Christchurch, turn off the water supply to that fixture, contain the leak, and check where it is coming from. Small leaks can worsen quickly, so it is best to address them promptly.

Why under-sink leaks are common

Leaks under sinks are one of the most common plumbing issues in homes and properties.

This is because there are multiple connections, pipes, and fittings in a small space.

First step – turn off the water

Most sinks have isolation valves located underneath.

Turn these off to stop water from flowing to the tap.

If you cannot locate them or they do not work, you may need to turn off the main water supply.

Contain the leak

Once the water is off, take steps to reduce any damage:

• Place a bucket or container under the leak
• Use towels to soak up water
• Remove items stored under the sink

This helps protect cabinetry and surrounding areas.

Identify the source of the leak

If it is safe to do so, check where the water is coming from.

Common sources include:

• Loose or worn pipe connections
• Leaks from the waste pipe or trap
• Drips from the tap or supply lines

Knowing the source helps determine the next step.

What not to do

Avoid over-tightening fittings or attempting repairs without knowing the cause.

This can sometimes make the problem worse.