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If you face low water pressure problems with your home’s water supply, don’t worry- you are not the only one.

We understand that it becomes very frustrating to deal with this issue. Imagine going to shower and spending an hour in the bathroom because of the reduced water flow! Although the problem can easily annoy you, there are plenty of ways to fix it.

The first thing to do is identify the cause behind the problem and then implement the correct method(s) to fix it. And today, in this guide, we will talk about the most common causes of low water pressure in your plumbing system. So, without further delay, let’s check them out.

7 Common Causes Of Low Water Pressure

Person Tap Water

1. Unwanted Build-up In Pipes

When minerals and debris build up in your pipes, it can slowly lead to the water pressure deteriorating over time. Many elements like dirt, sand and other pollutants can get deposited in the interiors of the pipes.

And if clogged pipes are not fixed in time, such accumulations will slowly start entering the sink through the tiny cracks in the pipes. Even the minerals present in water can decrease the water pipe diameter, adversely affecting the water pressure.

You can try DIY remedies like cleaning the pipes with baking soda and hot water or removing the pipes for thorough washing. But if the problem persists, get your local plumber to deal more effectively.

2. Corrosion

As pipes age, the water’s iron or other mineral content can cause them to corrode. And this can be the case for even those pipes or multiple plumbing fixtures that should last for at least 20 years.

You are most likely to notice a reduction in water pressure sooner or later because of corroded pipes, which would ultimately require replacements. Plus, it’s a good idea to prevent a burst pipe. And that’s a job best left to professionals.

You might notice a rusty plumbing fixture (such as a shower head) or faulty fixtures - this can also lead to low water pressure.

Corroded Plumbing Pipe

3. Supply Malfunction

Sometimes, it is not the pipes but the supply that malfunctions. The council’s water supply might face some problems because there might be some disturbance in the water pressure. Even those pipes are prone to confronting dirt, debris, mineral build-ups, and corrosion issues.

If the pipes in your house are alright and you are still facing a low water pressure situation, it is best to contact the local water supplier. They can check the pipelines and water meter valves.

4. Malfunctioning Shut-Off Valve

A malfunctioning valve can reduce the water pressure in multiple pipes or faucets. And to get that fixed, you must know how to check whether your main house shutoff valve is performing correctly.

But if you haven’t faced a leakage problem before, the chances are that you have not handled this valve. It can be located outside your house, but don’t forget to check inside.

Once you locate it, check the handles to see if the valve is open. The best thing to do is turn them counterclockwise as far as possible to ensure the valve is available. If it is turning, it isn’t completely open, which causes the water pressure to fall.

5. Old Pipes

If you have recently moved into a new house, the chances are that you will face a lowered water pressure situation because of the old and rusting pipes.

For example, if the existing water pipes are galvanized steel pipes, they will be corroded and have years of mineral build-up. Of course, this does not happen in a day, but mineral deposits build up over decades, reducing water flow.

You will probably notice the problem as soon as you move in, so we recommend replacing them immediately. And when it comes to installing new pipes, we would always suggest using PEX tubing instead of the traditional copper pipes.

6. Problem With The Pressure Regulator

Not all plumbing systems indeed come with a pressure regulator. So, feel free to skip this point if you don’t have one.

However, if you have it and are reeling under continued low pressure from your water outlets, check the regulator to see if you are getting a correct reading.

If the reading is incorrect, attach a pressure gauge to the hose spigot that is in the closest proximity to the regulator. Once installed, it will give you a correct water pressure reading when you turn the tap on.

If you witness a discrepancy in the readings displayed in the pressure regulator and the water pressure gauge, it can be just a failing pressure regulator. And if you are not getting a reading from a faulty pressure regulator, you know it needs to be replaced. For this purpose, we suggest you get a trained plumber to replace your broken pressure regulator.

Pressure Regulator

7. Shared Pipelines

Sometimes, the pipelines that deliver water are shared between houses and not just kept for personal use—wondering what this means? Let us break it down for you.

If you share a pipeline with your neighbour, the water pressure will decrease every time they showering or wash their car.

However, this doesn’t mean paying for their water consumption. But the pressure gets affected adversely because the water supply is divided. It is more like someone in the house running the dishwasher when you shower. Only this time, you cannot scold them for doing it while bathing!

One way around this is to change your timings and water consumption routines. These might seem quite a task, but they might be very effective. As long as you can understand when your neighbour is not indulging in heavy water usage, there will be no problem.

However, if the water pressure still does not improve, it is best to replace the pipes. Contact a licensed local plumber to do the work efficiently with no hidden charges. If they are not transparent with their prices, your bill will generally turn up much higher than expected.

Fixing Your Low Water Pressure

While you practically cannot solve a problem with the water supply company or main city supply pipe, you can always try other solutions. Start with a preliminary check and try out DIY techniques to see if you can raise the water pressure.

If you still cannot solve it, the next thing to do is call a trusted plumbing service provider to check your pipes’ existing condition. Nowadays, technology has improved greatly, and they can just put a CCTV camera to locate the blockage effectively before improving the water pressure.

The key here is to stay cautious and take a step when you see that the water pressure in your home has decreased. If you leave it unattended for long, the condition will deteriorate faster, resulting in repairs or replacements worth thousands of dollars. So, keep an eye on the faucets. Leaking pipes could also be another culprit.

If you are experiencing low water pressure in Perth, speak to our professionals at Woolf Plumbing & Gas.

And until next time!


Ashley Woolf

Ashley Woolf

Find them on their website: Woolf Plumbing & Gas, Facebook and LinkedIn.

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