Why Do I Have Low Water Pressure In My Home?

There's nothing quite as frustrating as stepping into the shower only to be met with a weak trickle, or watching the kitchen tap struggle to fill the kettle. If you're experiencing low water pressure in your home, you know exactly what we're talking about!

This guide is designed to help you understand why you might have low water pressure. We'll explore the common causes, from simple issues like clogged showerheads to more complex problems with your home's plumbing or even the main water supply.

We'll also provide you with easy to follow steps on how to improve your water pressure, so you can get back to enjoying a strong, steady flow throughout your house.

Low water pressure demonstrated by hand help under sink tap with meagre water flowing from the tap

Reasons for Low Water Pressure in Your Home

Low water pressure can be really frustrating, and figuring out why it's happening is the first step to fixing it. The truth is, there are many potential causes, and they can range from simple, easy to fix issues to more complex plumbing problems. It's important to remember that low water pressure isn't always a sign of a major disaster. Sometimes, it's just a matter of a small clog or a simple adjustment.

To help you understand what might be causing your low water pressure, we'll break down the most common reasons. We'll start with the basics, like issues with your local water supply, and then move into problems that could be happening within your own home's plumbing system.

By understanding these potential causes, you'll be better equipped to identify the source of your low water pressure and take the necessary steps to restore a strong, consistent flow.

Mains Water Supply Issues

Sometimes, the reason for your low water pressure isn't within your home at all, but rather with the Sydney Water supply. Your local water company is responsible for delivering water to your property at a certain pressure, and if there are issues on their end, it can directly affect your home's water flow.

Causes of low water pressure from your supply can be due to: scheduled maintenance or repairs on the water mains, high demand or problems at the water treatment plant. To check your mains water supply for issues, contact Sydney Water.

Problems with Your Water Meter or Pressure Regulator

After checking that the mains water supply isn't the issue, the next place to look is your home's water meter and pressure regulator. These components play a key role in controlling the water flow and pressure entering your home.

Water Meter Issues

While less common, a faulty water meter can sometimes affect water flow. If the meter is damaged, corroded, or partially blocked by debris, it can slow the flow of water, leading to lower pressure.

Pressure Regulator Issues

The pressure regulator (also known as a pressure reducing valve or PRV) is an important component that controls the water pressure entering your home. It's designed to maintain a consistent and safe water pressure, stopping excessively high pressure from damaging your plumbing.

The pressure regulator is usually located where the main water line enters your home. If you’re unsure how to adjust the pressure gauge, or your regulator looks damaged, it's best to call a qualified plumber. They can diagnose the issue and either adjust or replace the regulator as needed.

Clogged Pipes or Corroded Pipes

Over time, your home's water pipes can accumulate mineral deposits, rust, and other debris.

This buildup can significantly restrict water flow, causing noticeable drops in water pressure.

Signs of Clogged or Corroded Pipes:

Gradual Decrease in Water Pressure
Discolored Water (brown, red, or cloudy)
Strange Noises From Your Pipes
Localised Low Pressure: If the low pressure is only affecting certain fixtures, it could be a sign of a clog or corrosion in the pipes leading to those fixtures.

For minor clogs in accessible pipes, you might be able to use a drain snake or other DIY methods.

However, for larger clogs or suspected corrosion, it's best to call a qualified plumber. Plumbers can use specialised tools and techniques to clear clogs, inspect pipes for damage, and recommend appropriate solutions, such as pipe relining or replacement.

pipes from mains water supply corroded and leaking causing low water pressure into house

Leaky Pipes

A leak in your home's plumbing system can significantly reduce water pressure. Even a small, hidden leak can lose a decent amount of water, leading to a noticeable drop in pressure at your taps and showers.

Signs of Leaky Pipes:

Low Water Pressure
Water Stains
Damp or Mouldy Areas
Suddenly Increased Water Bill
Sound of Running Water (when all taps are off)
Wet Spots in Yard

What to Do If You Suspect a Leak

1️⃣ Check under sinks, behind toilets, and around your water heater for any signs of leaks.

2️⃣ Ensure that all connections on outdoor faucets and irrigation systems are tight and that there are no signs of damage.

3️⃣ Take a reading of your water meter and then avoid using any water for a few hours. If the meter reading changes, it could indicate a leak.

4️⃣ Call a Professional Plumber: If you suspect a hidden leak or if you are unable to locate the source of the leak, it is best to call a qualified plumber to locate and repair leaks quickly and efficiently.

Faulty Water Valves

The various valves throughout your home's plumbing system control the flow of water to different fixtures and appliances. If one of these valves is faulty, it can restrict water flow and cause low water pressure.

Types of Water Valves

Main Shut off Valve: This valve controls the water supply to your entire house.

Fixture Shut off Valves: These valves are located under sinks and behind toilets, controlling the water supply to individual fixtures.

Outdoor Tap Valves: These valves control the water supply to outdoor taps.

Appliance Shut off Valves: These valves control the water supply to appliances like washing machines and dishwashers.

What to Do to Check Water Valves

1️⃣ Check all the valve handles are fully open.

2️⃣ Look for any signs of water leaking from valves.

3️⃣ If a valve handle is stiff, try turning it on and off a few times to see if it loosens up.

4️⃣ Call a Plumber: If you suspect a valve is faulty, or if you are unable to fix the problem yourself, it's best to call a professional plumber.

High Demand with Multiple Fixtures in Use

Your home's plumbing system is designed to handle a certain amount of water flow at any given time. However, if you're using multiple fixtures at the same time, it can put a strain on the system and lead to a temporary drop in water pressure.

By being mindful of your water usage and taking steps to manage demand, you can minimise the impact of simultaneous fixture use on your water pressure.

What Should I Do If I Have Low Water Pressure in My House?

Finding out you have low water pressure in your house can be frustrating. But don't worry! Here's a step by step guide to help you troubleshoot and resolve the issue:

Is the water pressure problem isolated or throughout the house?
Does it affect hot or cold water?

What should i do if i have low water pressure in my house decision tree. is the water pressure problem isolated or throughout the house? if throughout the house, it's likely to be your main water supply, meter or pressure regulator. if isolated, problem is that fixture or pipes suppling it. does it affect hot or cold water? If hot water alone, likely to be a problem with your hot water system, faulty mixing valve or blockage in the hot water lines. If both hot and cold, it's likely to be your main water supply or more general plumbing problem.

When investigating potential causes of low water pressure, start with the simplest solutions first:

Clean aerators and showerheads
Check visible pipes and fixtures for leaks
Check your water meter and pressure regulator

If these checks pay no heed, consider whether you have noticed any changes in your water, such as discolouration or unusual noises. Also, contact your local water company and inquire as to whether there are any issues with the mains water, such as scheduled maintenance, or repairs.

If you suspect a problem with your water meter, pressure regulator, or a more complex plumbing issue, it's best to contact a qualified plumber. We can diagnose the problem accurately and provide the necessary repairs or solutions.

If you're unsure about anything, it's always best to seek professional advice.

Installing a Water Pressure Booster

If you've tried other solutions and are still struggling with low water pressure, or if your home simply has naturally low water pressure, a water pressure booster might be the answer.

Water pressure booters increase the incoming water pressure, providing a stronger flow to your fixtures using a pump. Most boosters have an inbuilt sensor that detects when the water is flowing and automatically activates the pump when it is needed.

If you're considering a water pressure booster, consult with a qualified plumber. We can assess your needs, recommend the right type of booster, and ensure proper installation.

Still Struggling with Low Water Pressure?

We get it, dealing with low water pressure can be a real pain. But, if you've tried troubleshooting the problem yourself and haven't found a solution, or if you simply want expert help to diagnose and fix the issue, GRH Plumbing is here for you.

Our team of experienced plumbers has the knowledge and tools to identify the cause of your low water pressure and provide effective solutions. We'll work quickly and efficiently to restore strong, consistent water flow to your home, so you can get back to enjoying the comfort and convenience you deserve.

Call GRH Plumbing today on 1300 643 850 let us help you solve your low water pressure problems!