Why Is My Water Pressure So Low? Common Causes and Solutions

You hop in the shower expecting a strong stream of water—and instead, you’re met with a weak trickle that barely rinses the shampoo out of your hair. Sound familiar? Low water pressure is one of the most frustrating plumbing problems a homeowner can face, and it never seems to happen at a convenient time.

At Happy Drain Guys Plumbing, we help Fairfax-area homeowners tackle low water pressure issues every day. The good news? Most causes are easy to fix (if you know where to look). The bad news? If left untreated, low water pressure can be a symptom of a bigger plumbing issue.

Let’s take a closer look at what could be behind that weak water flow.

The Sneaky Culprits Behind Low Water Pressure

Low pressure can come from a variety of sources—some temporary, some more serious. Here are the most common causes we see:

• Partially Closed Valves
  Check your main water shutoff valve and your water meter valve. If either is only partially open, your whole house will feel the effects.
• Clogged Aerators or Fixtures
  Mineral buildup inside your faucet heads or shower nozzles can restrict water flow. Remove and clean them to see if that solves the problem.
• Leaks in Your Plumbing System
  Even a small, undetected leak can divert water away from your fixtures. That’s not just bad for pressure—it’s bad for your water bill, too.
• Old, Corroded Pipes
  In older homes, galvanized steel pipes can corrode on the inside, narrowing the passage and reducing flow.
• Municipal Water Supply Issues
  Sometimes, it’s not your fault at all. Your city’s water main may be undergoing maintenance or experiencing low pressure.

What You Can Do About It

If low water pressure is isolated to one fixture, you may be able to fix it yourself by cleaning or replacing the aerator. But if the problem is happening throughout your home, it’s time to call in a professional.

At Happy Drain Guys Plumbing, we’ll diagnose the issue and get things flowing smoothly again. Whether it’s a hidden leak, failing pressure regulator, or something else entirely, our expert team will pinpoint the cause and get it fixed—fast.

Say Goodbye to Weak Water Flow
Stop putting up with slow showers and sluggish sinks. Call Happy Drain Guys Plumbing today to schedule your service. We’ll bring the pressure back—no stress, no mess.