TL;DR: If your shower or sink is draining slowly in Christchurch, it is usually caused by a build-up of hair, soap, grease, or debris inside the pipes. If left untreated, this can lead to a full blockage that requires professional clearing.

What causes slow drains in Christchurch homes

Slow drains are one of the most common plumbing maintenance issues across Christchurch.

In most cases, the problem develops gradually as material builds up inside the pipe. This restricts water flow and eventually leads to a blockage.

Common causes include:

• Hair collecting in shower drains
• Soap residue sticking to the inside of pipes
• Grease and food waste in kitchen sinks
• Dirt and debris washed down outdoor drains
• Tree roots entering underground pipes in older Christchurch properties

Even a small build-up can slow drainage noticeably.

Why it tends to get worse over time

A slow drain is usually the first stage of a blocked drain.

Once the inside of a pipe starts to collect residue, it becomes easier for more material to stick. Over time, the restriction grows until water can no longer pass through properly.

Many Christchurch homeowners first notice the issue as slow drainage, then suddenly find the sink or shower no longer drains at all.

What you can try first

If the problem has only just started, there are a few simple steps you can take.

Basic checks:

• Remove and clean the drain cover
• Pull out visible hair or debris
• Flush the drain with hot water
• Use a plunger to loosen the blockage

These can help if the build-up is close to the surface.

Signs the blockage is deeper

If the drain is still slow after basic cleaning, the issue is likely further down the pipe.

This is more likely if:

• Multiple drains in the property are slow
• The problem keeps returning
• Water backs up when using another tap
• You hear gurgling sounds in the pipes

In these cases, the blockage is usually out of reach of DIY methods.