5 Causes of Low Water Pressure & How To Fix It

04/26/24

When you turn on the tap, you expect a steady water flow to pour out. If you’re met with a trickle instead, you might wonder what’s wrong. Many common causes of low water pressure have straightforward fixes you can perform yourself, though others require professional intervention.

Common Causes of Low Water Pressure

Various problems, from mineral buildup to faulty valves, can decrease your home’s water pressure. Understanding the depth of each issue can help you decide whether a DIY approach is feasible or if it’s time to call a licensed plumber.

#1: Clogged Aerator

A faucet aerator injects air into the water stream to conserve water without altering the pressure — unless the aerator is clogged. Mineral deposits and grit can build up on the aerator’s screen, obstructing water flow.

How To Fix It

• Unscrew the aerator from the faucet.
• Clear the debris from the holes with a needle or brush.
• Soak the aerator in vinegar overnight if the buildup is extensive.
• Replace the aerator if it’s damaged.

#2: Partially Closed Main Shutoff Valve

Did you recently have plumbing work done? The plumber may have failed to turn the main shut-off valve all the way back on, reducing the water pressure throughout your house.

How To Fix It

• Locate the main shut-off valve, which is typically found where the main water line enters the house.
• Check the position of the valve.
• If it looks like a lever, turn it until it’s parallel to the pipe.
• If it’s a round knob, turn it counterclockwise as far as it will go.

#3: Water Supplier Issue

Sometimes the water pressure is low before it even enters your house. An issue with the municipal water supply could affect not just your home but your neighbors as well.

How To Fix It

• Contact some of your neighbors and ask if their water pressure is low, too.
• Call your water supply company to ask if issues are occurring on their end and when they expect the problem to be fixed.

#4: The Pressure Regulator Is Failing

Some plumbing systems are outfitted with a pressure regulator to boost or decrease the water pressure entering your home. If you have one, you can test it yourself to determine if it’s failing.

How To Fix It

• Attach a water pressure gauge to an outside spigot, preferably one close to the pressure regulator.
• Turn the water on and check the reading.
• If the pressure is lower than 40 to 60 PSI, it could be time to replace the regulator. You’ll need a plumber’s help to do this.

#5: Corroded or Leaky Pipes

Corrosion and leaks in your water supply line restrict water flow. This problem is more common in older homes with outdated metal piping. Due to the complexity of dealing with corroded or leaky pipes, it’s advisable to call a professional plumber.

How To Fix It

• Explain the symptoms to a qualified plumber.
• They will perform a detailed inspection to identify all corroded or leaking pipes.
• Based on the inspection, the plumber will either repair the affected pipes or recommend replacing sections of your plumbing system.

When to Call Caffi Services Inc.

If you’ve tried some simple fixes and your water pressure hasn’t improved, chances are you have a more complex issue on your hands. That’s when you should call the experts at Caffi Services Inc. Our skilled professionals have the knowledge and experience to diagnose and repair your water pressure problems.

Why Call Caffi Services Inc.?

When you trust us to help with your plumbing problems, you benefit from over 50 years of local plumbing experience backed by a 100% satisfaction guarantee. We only use the highest-quality products and proven techniques to do the job correctly. With our 24/7 emergency services, you won’t have to deal with low water pressure for long.

Don’t let plumbing problems disrupt your day — connect with us for help restoring the water pressure in your Northern Virginia home.