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Common Causes Of Low Water Pressure

Are you facing issues with low water pressure but don’t know where the problem lies? Our guide highlights the common reasons for a drop in water pressure.

Isn’t it frustrating when there is insufficient water pressure in the shower to wash the soap from your eyes?

Somehow, you leave the shower on tippy-toes to avoid falling over and call your water supplier to give them an earful. But if the problem doesn’t lie at their end, you might have more severe plumbing issues.

In this guide, we have shortlisted the main reasons for low water pressure, pointing out the quickly solvable issues from those that require professional help.

Common Causes Of Low Water Pressure

Water Pressure Bathroom Tap Producing Water

1. Water Metre Valve

The water metre valve is one of the first to check if water is trickling from the tap. Depending on your plumbing system, you can find two shut-off valves in your water meter valve, among which the first is the water metre valve.

It’s beside the main supply pipe, providing water from the city to your home. In most cases, people have no use for the water metre valve since it’s the property of your respective water company and is operated by professionals.

But if the water pressure is low, there’s a chance that the metre valve is only partially open, which usually happens when plumbing work has been done recently. The plumbers might have forgotten to open the valve, reducing water pressure.

We recommend checking the metre box, which you can find on the outside wall of your home in a warm climate. It can also be in the garage, basement, or underground between the street and your property.

You can tell if the valve is open by looking at the metal handle and whether it’s parallel to the water pipe. Because if it’s at an angle, you’ll have to use a wrench to open it.

2. Worn Out Steel Pipes

People often have galvanised steel pipes installed into their plumbing system, but over time, they wear out to the point of no return. When galvanised pipes get corroded, water pressure can be reduced, restricting water flow. Moreover, the corrosion attacks the pipe on the insides, so you can’t spot the damage from the outside.

It gets to a point when the corrosion closes the pipe opening, leaving you with no option but an expensive renovation project. However, it takes years for the corrosion to set in and deteriorate the pipes, meaning that the drop in water pressure is gradual. Most homeowners fail to realise something’s wrong until it’s too late.

Australians face similar issues when switching homes, especially when they move into an old property with steel pipes. In such instances, the corrosion has already set in, and only a few weeks of heavy use can render the pipes useless.

The best way to fix leaking pipes is to reline the system using a no-dig pipe relining method, reducing rusting in the future.

3. Faulty Pressure Regulator

You may not know, but the plumbing system has a pressure regulator, also known as a pressure-reducing valve, which could affect the water pressure. It’s no rocket science that a broken pressure regulator will fail to control the input pressure of the plumbing system and reduce it to a safe level. To get an accurate reading of the water pressure in your house, test the pressure by attaching a water pressure gauge to the outdoor hose spigot closest to the water main or pressure regulator.

Not all homes have a pressure regulator, but properties may experience a sudden spike or fall in water pressure supply when they have a malfunctioning pressure regulator. The silver lining is that you can instantly tell a failing pressure regulator, as it impacts the water supply throughout the house.

DIYers can often replace the regulators themselves, provided the replacement is from the same brand and has compatible fittings. But if you’re unsure, call a professional plumber.

After testing the pressure with a pressure gauge, they will shut off the water supply using the water metre valve. It’s easy to attach the pressure gauge to the fixture closest to the regulator or main supply line to get a reading. Usually, the average pressure is around 75 pounds per square inch, but it may vary depending on your locality.

Don’t hesitate to fix the issue ASAP when the pressure is significantly less.

4. Check The Main Shut-Off Valve

Remember when we mentioned that there are two shut-off valves in a home? You already know about one, but the other valve controls the water supply into your house. It manages the water flow from the city pipeline and extends through your home’s foundation walls.

You should ensure this valve is open; turn the wheel-like handle counterclockwise to increase the water flow if it’s a gate valve. You’ll need to adjust the lever position for a ball valve and ensure it’s not at an angle but parallel to the pipeline.

Like the water metre valve, plumbers may leave the shut-off valve partially closed after fixing any issue. So, whenever your water pressure drops after repair work, know that the problem lies with the metre or shut-off valve.

Main Shut Valve Green Handles

5. Debris Build-up

After years of neglecting the water pipes, debris build-up may clog the pipe opening, affecting the water supply and reducing the pressure. Anything from sand, grease or solid items like food particles and foreign objects can block the pipes, making regular maintenance of the plumbing systems essential.

A prolonged blockage can lead to burst pipes and flooding, requiring more manual labour and plumbing fixtures costs. So, make sure you clean fixtures and fittings and your drains.

6. Contact The Water Supplier

It would be best to contact your water supplier when you’ve tried all the above methods but can’t find the reason for low water pressure. Sometimes, the supplier might have issues maintaining steady pressure, affecting the supply in your home.

You can know when your neighbours are facing similar problems, so call the supplier and clarify when they can restore the regular supply.

7. Shared Pipelines

People sharing pipelines can lead to low water pressure more often than not. For instance, when your neighbour is taking a shower or washing the car, does it affect the water pressure in your home?

This happens when the water supply is divided between multiple homes, and if it’s leaving you irritated, contact a professional plumber for pipe replacement. This will permanently fix the problem if you’re willing to bear the cost of renovations.

Still, Experiencing Low Water Pressure?

That’s everything we had to tell you about the common causes of a drop in water pressure in your home.

As you can see, not all these are serious plumbing issues, and, in some instances, it’s pretty easy to open the valve or check the water pressure yourself. You’ll have to contact a plumbing company for more critical problems since they have the equipment to free up the clog or replace the pipes without causing property damage.

At Fixed Today, our Sydney plumbers are highly experienced and can quickly detect the cause of no water pressure, providing you with a cost-effective and permanent solution. Call us today for more information or to book an appointment.

See you next time!

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