5 Reasons for Low Water Pressure When Turning On a Faucet

why does pressure drop when turning on faucet

Experiencing a drop in your faucet’s water pressure can be puzzling and frustrating. Imagine anticipating a refreshing stream of water, only to be met with a meager trickle.

Several common household issues could be causing this problem. Understanding these can help you understand why your faucet isn’t performing as it should.

More importantly, it’s essential to address low water pressure promptly. Not only does it affect your day-to-day activities like washing dishes or taking a shower, but it might also hint at underlying plumbing issues that could worsen over time.

In this blog post, we’ll dive into five potential reasons your water pressure is low, offering you insight and solutions to restore your faucet to its full potential.

1. Water Supply Issues

Municipal Water Supply Problems

I recall turning on my faucet only to be greeted with a sad trickle. After much introspection (and much frustration), I discovered the problem wasn’t within my house; it was a municipal water supply issue.

Sometimes, low water pressure could be due to work on your local water supply. Infrastructure upgrades or quick fixes can temporarily bring down your water pressure.

If you face this problem, reach out to your local water department. They should be able to provide you with an update and an estimated timeline for a solution.

Shared Water Lines in Apartment Complexes

Living in an apartment has unique challenges, and water pressure is one of them.

I remember living on the top floor of a bustling apartment complex, where my morning showers were often reduced to a slow drip.

The cause? Shared water lines. In large apartment buildings, numerous units often share the same water lines.

So, if multiple tenants use water simultaneously—say, during the morning rush—your water pressure can take a significant hit.

Sediment Buildup in Water Mains

One morning, I woke up to find my kitchen faucet barely dribbling out water.

After some investigation, I found the culprit to be sediment buildup in my water mains.

Over time, minerals and other particles in the water can deposit inside your pipes, gradually reducing the inner diameter and affecting water pressure.

In some cases, hiring a professional to clean or replace your water pipes might be necessary if the buildup becomes too severe.

It was a challenging experience, but it taught me the importance of regular maintenance and keeping an eye on my plumbing system.

2. Plumbing Obstructions

Clogged or Corroded Pipes

I remember when my house’s water flow resembled a sluggish stream. After some troubleshooting, I found the problem was due to clogged pipes.

Over time, minerals and debris had accumulated, causing a severe blockage. In addition, older pipes can sometimes corrode, further reducing water flow.

I learned that regular plumbing check-ups are as important as regular health check-ups!

Leaky or Damaged Pipes

One day, I noticed water stains on my basement ceiling, a clear sign of a leaky pipe. If your pipes are leaking, not only does water escape before it reaches your faucet, but it can lead to costly water damage.

It took a bit of detective work to find the source of the leak, but once I did, I quickly realized the importance of addressing the issue immediately.

A professional plumber was able to fix the leak, which, in turn, improved the water pressure.

Airlock Issues

Ever experienced sputtering from your faucets, followed by a drop in water pressure? I dealt with such a scenario where an airlock was the cause.

Airlocks occur when air gets trapped in your pipes, disrupting the water flow. It can happen after some plumbing work or if a tap hasn’t been used.

The journey of resolving airlocks made me appreciate the complexity of plumbing systems and the need for professional intervention when necessary.

3. Faucet-Specific Problems

Faucet Aerator Blockage

Once, I had a problem where my faucet barely produced water. The trickle was more of a drip than a flow.

After some research, I discovered the culprit was a blocked faucet aerator. Aerators are the unsung heroes of our faucets, regulating water pressure and preventing splashing.

However, they can become clogged with mineral deposits over time, reducing water flow. Fortunately, cleaning them was pretty simple.

I removed the aerator, soaked it in vinegar overnight, and scrubbed it with an old toothbrush. My faucet was back to normal in no time!

Valve Problems

Last summer, I had a bizarre issue where one of my faucets stopped producing cold water. It was a valve problem, as I later discovered.

Valves control the water flow within your plumbing system, and when they malfunction, it can lead to odd issues like the one I experienced.

I had to call a professional plumber to replace the faulty valve. Ever since then, I have made sure to check the valves to prevent such surprises regularly.

Old or Faulty Fixtures

Old or faulty plumbing fixtures are another common source of problems. A few years back, I had a faucet that was so old it started leaking and had reduced pressure.

The seal within the fixture had worn out, making it inefficient. Instead of trying to repair it, I opted for a fixture upgrade, which proved to be a better long-term solution. Remember, sometimes, the best fix is a replacement!

4. Water Pressure Regulator Malfunction

Role and Importance of Water Pressure Regulators

As the name implies, water pressure regulators control your house’s water pressure. They’re like the unsung conductors of the plumbing symphony, ensuring that your water isn’t too hard or too soft but just right.

Just last year, I began noticing that the water flow in my home was unusually high. Showering felt like standing under a waterfall; filling a glass of water was like a race.

Signs of Regulator Problems

Water pressure that is too high or too low is a tell-tale sign of regulator problems. Your regulator might be the issue if your faucets act more like fire hoses or babbling brooks.

In my case, I also started noticing that my water bill was suspiciously high. It wasn’t until I had a friend over who pointed out the abnormal water pressure that I connected the dots.

Repair or Replacement Options

If you’re dealing with a malfunctioning water pressure regulator like I was, take heart; it’s usually not a complicated fix. You can try adjusting the regulator yourself if you’re feeling handy.

However, if you’re anything like me and prefer to leave plumbing to the professionals, you’ll want to call a plumber.

I opted for a replacement because my regulator was quite old, and ever since it was replaced, my water pressure has been as steady as a calm stream.

Remember, a little preventive maintenance can save you a lot of trouble in the long run, and don’t hesitate to reach out to professionals when in doubt.

Home Maintenance and DIY Solutions

  • How to check and clean faucet aerators

Faucet aerators are nifty little devices controlling the water stream leaving your tap. If the water flow from your faucet is slow or inconsistent, the aerator might be the culprit.

I’ve found it’s a good idea to check and clean your faucet aerators regularly. Disassembling the faucet to reach the aerator is straightforward, requiring only a pair of pliers.

Once you remove the aerator, a simple rinse under running water usually removes any sediment build-up.

However, if the build-up is considerable, soaking the aerator in vinegar helps break down the mineral deposits.

  • Basic pipe maintenance tips

Pipes are the blood vessels of your home plumbing system. Regular pipe maintenance can prevent a lot of headaches down the road.

One strategy I’ve found effective is to periodically run hot water down the drain to dissolve any potential blockages.

It’s also a good idea to be mindful of what goes down your drain – avoid disposing of food, oil, or other debris that can clog your pipes.

  • When to call a professional

There are times when DIY solutions just don’t cut it. If you notice persistent low water pressure, strange noises in your pipes, or unexplained high water bills despite your best efforts, it’s time to call a professional.

I learned this the hard way when I tried to tackle a stubborn pipe blockage and turned a minor problem into a major one.


Low water pressure can be due to various factors, including blocked pipes, malfunctioning water regulators, leaks, outdated plumbing, or issues with your local water supply.

In my experience, identifying the root cause is the first step towards addressing the problem effectively.

Ignoring signs of low water pressure can lead to more severe plumbing issues down the line, not to mention higher utility bills. It’s essential to diagnose and address the issue as soon as possible.

Don’t hesitate to seek professional help if you’re experiencing persistent issues with your water pressure.

Remember, an ounce of prevention is worth a pound of cure. I wish I had called a professional sooner when dealing with my water pressure issues, and I encourage you to do the same if needed.


Hi! I’m Kobby, one of the co-owners of favoredstoneguides.com and the newest house owner in town. I’m a huge fan of most things natural. Over here on this site, I'm happy to share all the exciting hacks, tricks, and tips I have learned and continue to learn each day about taking care of natural stones.

Recent Posts