Why Low Water Pressure Happens — And How to Fix It

Few things are more frustrating than stepping into the shower or turning on the kitchen faucet only to be met with a weak trickle of water. Low water pressure can disrupt your daily routine and signal underlying plumbing problems that need attention.

The good news? Most causes of low water pressure are fixable—and some are even preventable with regular maintenance. In this post, we’ll explain the common reasons why water pressure drops and how you can get it flowing strong again.

🚰 Common Causes of Low Water Pressure

1. Clogged Pipes or Fixtures

Over time, mineral buildup, rust, or debris can clog pipes or faucet aerators, especially in homes with hard water. This restricts water flow and leads to reduced pressure.

How to fix it:

• Remove and clean faucet aerators or showerheads.

• Use vinegar to dissolve mineral deposits.

• For whole-house issues, a plumber may need to inspect and clean your pipes.

2. Faulty Pressure Regulator

Many homes have a water pressure regulator (also called a pressure-reducing valve). If it fails, you may experience either unusually high or low water pressure throughout the house.

How to fix it:

• A plumber can test and adjust the regulator.

• If it’s faulty, it may need to be replaced.

3. Corroded Plumbing Pipes

If your home has older galvanized steel pipes, corrosion could be slowly narrowing the interior of the pipes, reducing water flow. This happens gradually, so you might not notice it right away.

How to fix it:

• A full or partial pipe replacement may be necessary.

• Consult a licensed plumber to inspect the condition of your plumbing.

4. Leaks in the Plumbing System

A hidden leak in your pipes can divert water away from fixtures, leading to decreased pressure. You might not see the leak, but you may notice water damage, mold, or higher water bills.

How to fix it:

• Shut off all water and monitor the water meter.

• If it still moves, you likely have a leak.

• A professional plumber can locate and repair hidden leaks.

5. Municipal Water Supply Issues

Sometimes, the problem isn’t inside your home at all. Your city or town's water supply system could be experiencing problems, performing maintenance, or reducing pressure for certain areas.

How to fix it:

• Check with neighbors to see if they’re experiencing the same issue.

• Call your local water provider for updates.

6. Shared Supply Line or Peak Usage

If you live in an apartment or share a water line with neighboring properties, water pressure can drop during peak usage times (like mornings or evenings).

How to fix it:

• Install a booster pump to maintain consistent pressure.

• Consider upgrading to separate lines (in rare cases, if feasible).

7. Closed or Partially Closed Shutoff Valves

Your home has several shutoff valves that control water flow. If one is accidentally left partially closed (after a repair, for instance), it can limit pressure.

How to fix it:

• Check your main water valve (usually near the meter or where the main line enters the home).

• Ensure it’s fully open.

• Also check individual fixture shutoffs under sinks or behind toilets.

🧰 When to Call a Professional Plumber

If you’ve gone through the basics and still can’t pinpoint the cause, it’s time to call in a pro. A licensed plumber can:

• Perform a pressure test

• Inspect pipes for clogs, leaks, or corrosion

• Evaluate your pressure regulator or water heater

• Recommend long-term solutions like repiping or booster systems

✅ Preventing Future Water Pressure Problems

• Flush your water heater annually to prevent sediment buildup

• Install a whole-house water filter if you have hard water

• Schedule routine plumbing inspections

• Stay aware of pressure changes and act early when problems arise

💡 Final Thoughts

Low water pressure isn’t just annoying—it’s often a sign that something in your plumbing system needs attention. From simple DIY fixes to more serious repairs, there’s always a solution to restore your home’s water flow.

🚿 Need Expert Help?

If you’re tired of weak water pressure or suspect there’s a bigger problem lurking in your pipes, Karney Plumbing is here to help. Our experienced plumbers proudly serve Broken Arrow Oklahoma and can diagnose and resolve your water pressure issues quickly and affordably.

📞 Call us today at918-910-9977 or schedule a service online — and get your water pressure back where it belongs.