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You are in Phoenix. We also have a Tucson site.

You are in Phoenix. We also have a Tucson site.

Low Water Pressure: What It Means and How to Fix It



Is low water pressure a sign of an impending plumbing emergency? It might be! If you’ve noticed a drop in water pressure around your home, it’s time to get to the bottom of it. There are several potential causes for low water pressure, some minor and others that could signal bigger issues.

Let’s explore the most common culprits behind low water pressure and how to address them.

Key Takeaways

  • Low water pressure is often caused by issues like older pipes, clogs, or a partly closed shut-off valve.
  • Your home’s water pressure should ideally be between 40 and 45 PSI.
  • Sometimes, the issue is with your water supply or utility company, so it’s a good idea to check with your neighbors or your service provider.

Now, let’s dive deeper into the reasons behind low water pressure and what you can do about it.

1. Older Pipes: A Common Cause

As homes age, so do their pipes. This wear-and-tear can lead to low water pressure. Corrosion or small leaks in old pipes can restrict water flow, making it difficult to maintain good pressure. This is especially common in homes with galvanized steel pipes, which can start to corrode after around 20 years.

If you suspect older pipes might be the issue, it’s best to have a professional plumber take a look and potentially replace the aging sections of your plumbing.

2. Clogged Pipes: Blockages That Reduce Flow

One of the most common causes of low water pressure is a clog or blockage somewhere in your pipes. Even a small obstruction can slow the flow of water, reducing pressure in your faucets and showers.

If you notice low water pressure in only one area, it’s likely there’s a blockage nearby. A plumber can help locate and remove the clog, restoring your water pressure to normal.

3. Water Supply or Utility Company Issues

Sometimes, the problem isn’t within your home at all. If your neighbors are also experiencing low water pressure, the issue could be with your water supply or utility company. This could happen due to temporary disruptions, such as power outages or maintenance on the city’s water lines.

If you suspect this might be the case, contact your water service provider to check if there are any ongoing issues in your area.

4. Partly Closed Shut-Off Valve: A Quick Fix

A partly closed shut-off valve is another possible cause of low water pressure. This can happen if the valve wasn’t fully reopened after maintenance or repairs. The good news? It’s a simple fix.

Check that the shut-off valve is fully open. If the lever is parallel with the pipe, it’s open. If it’s even slightly angled, that could be restricting your water flow. Adjusting the valve might be all it takes to restore normal pressure.

5. Faulty Faucet Fixture: Check the Aerator

If low water pressure seems isolated to one faucet, the issue could be with the faucet fixture itself. Over time, the aerator (the small mesh screen that helps regulate water flow) can become clogged with dirt or mineral deposits, reducing water pressure.

Try cleaning or replacing the aerator to see if that improves the flow. If the problem persists, it might be time for a new faucet fixture.

Final Thoughts: Don’t Ignore Low Water Pressure

Low water pressure can be annoying, but it might also be a sign of a bigger issue within your plumbing system. Whether it’s aging pipes, a clog, or a simple shut-off valve adjustment, it’s important to address low water pressure sooner rather than later.

If you’re unsure what’s causing the drop in pressure or need help with repairs, Parker & Sons is here to help. Our expert plumbers can diagnose the problem and get your water flowing properly again!


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