Why is your water pressure low? 5 reasons why

Low water pressure can be incredibly frustrating, especially when you're trying to enjoy a shower or do household chores. If you've been dealing with low water pressure in your Auckland home or business, you're not alone. Several factors could be causing the issue. Let’s explore some reasons why.

1. Clogged Pipes

One of the most common causes of low water pressure is clogged pipes. Over time, rust (on older galvanised pipes), and debris can accumulate inside your pipes and fittings, causing blockages that restrict water flow. This is particularly common in older homes with outdated piping systems.

If you suspect clogged/aging pipes, it's essential to get them checked by a registered plumber.

2. Faulty Pressure Limiting Valve

In many homes, a pressure limiting/reducing valve is installed to control and maintain a consistent water pressure. If this device is failing or is set incorrectly, it can lead to either too high or too low water pressure. A faulty pressure valve can result in low water pressure throughout your home, especially noticeable when two or more taps have been turned on.

If your home has a pressure limiting valve and you're experiencing low water pressure, we recommend having it checked and tested.

3. Leaks in the Plumbing System

Hidden leaks in your plumbing system could be reducing your water pressure, not to mention a higher water bill.

Even small leaks, such as those in walls or underground pipes, can significantly impact your water flow. If you've noticed damp spots on walls or floors or higher than usual water bills, you might be dealing with a leak.

A tip to check for leaks, make sure all fixtures are turned off inside the house, go over to the water meter and if you notice the numbers ticking over, you probably have a leak.

4. Blocked fixtures and aerators

Sometimes, low water pressure is isolated to a single fixture, like your showerhead or taps. Debris from the mains or mineral build-up, especially in homes with hard water, can clog the tiny holes in your fixtures, restricting water flow. A clogged showerhead or faucet aerator can result in a frustratingly weak stream of water.

Cleaning or replacing the aerator or showerhead may solve your low-pressure issue.

5. Municipal Water Supply Issues

If your water pressure is low throughout your entire home and no plumbing issues are found, it’s possible that the problem lies with the municipal water supply. During maintenance or repairs, the local water company may lower the water pressure temporarily.

Talk with your neighbours to see if they experience the same issues.