5 Reasons New Faucet Has Low Water Pressure & What to Do

why does my new faucet have low water pressure

Nothing can be quite as frustrating as installing a brand-new faucet only to experience low water pressure.

It’s a common issue many homeowners face, and understanding the possible causes is the first step to resolving it.

This guide is designed to help you navigate this common plumbing issue by identifying the main reasons for low water pressure in a new faucet and offering practical solutions.

The reasons can range from issues with the aerator to problems in the broader home plumbing system. Let’s dive in and expose these culprits!

1. Water Supply Issues

Check Water Supply Valves

Like me, you might be surprised to learn that one of the most common culprits behind low water pressure in new faucets is an issue with the water supply valves.

I remember how confused I was when I first encountered a similar problem. My brand-new faucet was barely trickling water, and I was baffled until I discovered that the water supply valve wasn’t fully open.

Always ensure to check both the hot and cold water supply valves. They should be turned all the way counter-clockwise to ensure maximum water flow.

Identifying Sediment or Debris Blockages

You wouldn’t believe how many times I’ve been called to fix a “major plumbing issue” that turned out to be a blockage due to sediment or debris.

It’s common, especially in older homes or after a new installation. Small pieces of sediment or debris can quickly enter the pipes and cause blockages, reducing the water pressure in your new faucet.

Always inspect the faucet and supply lines for any possible blockages.

Step-by-step Guide to Resolving Supply-related Problems

Here’s a helpful anecdote from my experience solving my supply-related problems. I always recommend starting with the most straightforward solution: the water supply valves.

Turn them off, then back on, ensuring they’re fully open. If the problem persists, turn off the water supply and disconnect the supply lines from the faucet.

Check for any visible debris and clean it out if you can, try to run water through the supply lines into a bucket to clear any blockages further.

Don’t forget to ensure all connections are secure when you’re done. A little proactive examination and cleaning can save you a lot of stress!

2. Aerator Problems

Ah, the aerator! The unsung hero of faucet functionality. I have seen many cases where a simple aerator issue was the culprit behind low water flow. So let’s understand it better, shall we?

The Role of Aerators

The aerator is a small device on the tip of your faucet that mixes air with your water. Why is this important, you ask? Well, it’s all about efficiency.

The aerator reduces the water flow, saving you money on your water bill while providing enough pressure for everyday use.

It also helps reduce splashing. I remember when my faucet was power-washing my dishes instead of just rinsing them, it turns out it was a missing aerator!

Cleaning or Replacing Clogged Aerators

Aerators, like any other part of your plumbing, can get clogged over time. I once had to deal with a faucet that suddenly seemed to lose pressure.

I was scratching my head until I thought to check the aerator. Unscrewing it, I found it was full of sediment! After a quick clean, the water flow returned to normal.

So, if you’re experiencing lower water pressure, remove the aerator and check for any debris.

You can usually clean it out with an old toothbrush under running water. You might need to replace it if it’s severely blocked or damaged.

Tips for Maintaining Proper Water Flow

Aerator maintenance is all about regular care. Every few months, unscrew your aerator and give it a good clean.

You might want to do this more frequently if your water supply has a high sediment content. If your aerator is on its last legs, don’t be afraid to replace it.

They’re not expensive, and the difference a new aerator can make is astounding. Trust me, I’ve seen it first-hand!

Remember, the health of your faucets is in your hands. A little preventative care can go a long way in ensuring a steady, strong water flow.

3. Plumbing Installation Errors

Oh boy, let’s talk about common mistakes made during plumbing installations that can lead to low water pressure. Trust me, I’ve seen a few!

Common installation mistakes causing low-pressure

  1. Incorrect Pipe Sizes: This is a biggie. I recall helping a friend renovate his kitchen, only to discover that the pipes installed were too small for the faucet. This resulted in low water pressure despite his best efforts. Ensure that the pipe sizes match your fixtures to avoid this issue.
  2. Loose or Leaky Connections: You’d be surprised how often this occurs! A small leak or a loose connection can significantly reduce water pressure, just like when I wondered why the faucet in my bathroom had such low pressure. Sure enough, upon investigation, I found a small leak.
  3. Improper Valve Settings: I learned this hard when I moved into my first apartment. The water pressure was so low it was almost impossible to wash dishes. I later discovered that the water valve was not fully open.

How to correct these errors or when to call a professional

All these issues can be fixed with some know-how, but sometimes, calling in a professional is best.

If you’ve got incorrect pipe sizes, you might need to re-install your plumbing with the correct size, which is a job for a professional. I attempted this fix myself, only to realize I was over my head.

Loose or leaky connections might need a little tightening, but it’s important to remember not to overtighten, or you might create new problems.

I usually try fixing these myself, but if it’s too complex or unreachable, I don’t hesitate to call a plumber.

As for improper valve settings, you can quickly correct this by turning your valve to the correct settings.

However, if you are unsure or uncomfortable doing it yourself, a professional plumber can help. Remember, when in doubt, call a pro. I’ve learned this lesson the hard way!

4. Pipe Blockages

One of the most common and frustrating issues leading to low water pressure is pipe blockages. We’ve all probably dealt with it at one point or another.

Identifying Potential Obstructions in Plumbing Lines

The first step in dealing with this problem is identifying potential obstructions in your plumbing lines.

I remember the first time I encountered this issue in my own home. I noticed an unusual decrease in water pressure in my kitchen sink.

I tried all the usual fixes, but nothing worked. Finally, after a little investigation, I realized that there was a blockage in the pipes.

Identifying obstructions can be as simple as checking the water flow in different areas of your house.

If one area has significantly lower pressure than the others, this may indicate a blockage.

DIY Methods and Professional Help for Clearing Blockages

There are several DIY methods you can try to clear the blockages yourself. My go-to method is a good old-fashioned plunger.

You’d be surprised at how effective it can be! Another method that has worked for me is pouring hot water down the drain to help dissolve any potential blockages.

However, these home remedies are sometimes insufficient, and professional help is required. I had one particularly stubborn blockage that I couldn’t clear.

After several failed attempts, I admitted defeat and called a professional plumber. The plumber quickly and efficiently cleared the blockage, restoring my water pressure to normal.

5. Pressure Regulator Adjustment

The pressure regulator is another key component in maintaining appropriate water pressure in your home.

In my experience, adjusting or replacing a malfunctioning regulator can make a difference.

What a Pressure Regulator Does

In its simplest form, a pressure regulator controls the water pressure entering your home from the city supply.

It’s like a bouncer at a club, ensuring that the pressure is just right – not too high, not too low. I remember when I first learned about pressure regulators during a water pressure crisis.

Too much pressure had caused several leaks in my home, and that’s when I realized the importance of a pressure regulator.

How to Adjust or Replace a Malfunctioning Regulator

Adjusting or replacing a malfunctioning regulator isn’t as daunting as it sounds. I’ve done it myself a couple of times.

Usually, you’ll need a wrench and a bit of elbow grease. Turn the screw on the regulator to adjust until you reach the desired pressure.

Replacing a regulator is a bit more work. You’ll need to replace the existing regulator with a new one.

Ensure you turn off the water supply before starting any work. Remember, always call a professional if you’re uncomfortable doing it yourself.

Benefits of Proper Pressure Regulation

Proper pressure regulation is crucial for several reasons.

Apart from preventing leaks caused by excessive pressure, it also ensures a consistent water flow throughout your home.

Imagine showering with just the correct pressure – it’s a game-changer!

Additionally, regulating the pressure can help extend the life of your plumbing system by reducing stress on the pipes.

I’ve noticed a significant decrease in plumbing issues in my home since I started paying attention to pressure regulation.


So, what have we learned? Proper pressure regulation is essential for a well-functioning plumbing system. Regular maintenance and checks can prevent future issues, and it’s crucial to call a pro when in doubt.

I encourage each of you to take a moment to check the water pressure in your homes. Don’t wait for a crisis to learn about your plumbing system. It’s easier than you think to adjust or replace a pressure regulator.

Remember, a well-maintained plumbing system is a happy plumbing system. Regular checks can help you spot potential problems before they escalate. Stay curious, stay informed, and don’t be afraid to call in the experts when 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.

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