Why Is My Water Pressure Low?

Weak water pressure is a frustrating issue, from causing unsatisfying showers to slowing down your daily routine. Not only is this annoying, but it may also signal a more serious plumbing issue. In the greater Chicago area, especially in older neighborhoods like Lake Bluff, aging pipes, corrosion, or underground leaks can contribute to persistent water pressure problems. Understanding the causes and solutions can help you know when to take action and whether it’s time to call for professional plumbing service.

6 Common Causes of Low Water Pressure

Water pressure problems can come from a variety of issues, ranging from simple blockages to more complex plumbing failures.

Mineral Buildup in Pipes

Over time, mineral deposits from hard water can accumulate inside your pipes, narrowing the flow path and reducing pressure. This is especially common in older homes and can gradually worsen until the pipes need replacement or professional cleaning.

Partially Closed Shut-Off Valves

If your main water shut-off valve or individual fixture valves are only partially open, it can restrict water flow throughout your home. This is an easy fix, but often overlooked, so don’t forget to check your shut-off valve if you find yourself dealing with weak water pressure.

Faulty Pressure Regulator

Many homes have a pressure regulator that keeps water pressure at a safe level. If it fails, it can cause pressure to drop suddenly—or spike. A malfunctioning regulator typically needs to be replaced by a professional.

Leaky Pipes

A hidden leak in your plumbing system can divert water away from your fixtures, resulting in reduced pressure. Leaks may be underground, behind walls, or under flooring, and often require professional detection.

Corroded Pipes

In older homes, corroded or aging galvanized steel pipes are a common plumbing problem. Corrosion not only blocks water flow but also increases the risk of leaks or burst pipes.

Water Heater Issues

If you only experience low water pressure when using hot water, you may need a water heater repair. Sediment buildup in the tank, a faulty or partially closed water heater valve, or water heater leaks can all cause low water pressure when using hot water.

Municipal Supply Issues

Sometimes the issue isn’t in your home at all. If your neighbors are experiencing similar problems, your water supplier may be dealing with system maintenance or a temporary drop in pressure.

DIY Troubleshooting & Repairs

Before calling a plumber, there are a few steps you can take to troubleshoot the issue:

• Check all faucets to see if the problem is isolated or affecting the whole house.
• Test both your hot and cold water to see if they are both experiencing low water pressure.
• Inspect shut-off valves near the main water supply and under sinks to ensure they are fully open.
• Clean faucet aerators and showerheads to remove any buildup that may be restricting flow.
• Check your water pressure regulator, if accessible, to see if it’s working properly.
• Ask neighbors if they are experiencing the same issue to rule out a municipal water problem.

When To Call a Professional

If the steps above don’t solve your water pressure problem—or if you suspect a leak, corrosion, or a failed pressure regulator—it’s time to bring in a professional. The expert plumbers at Cahill Heating, Cooling, Electric, Plumbing & Sewer have the tools and training to diagnose and fix low water pressure problems quickly and efficiently. Whether it’s a hidden leak, failing valve, or outdated piping, we’ll identify the root cause and offer reliable plumbing repair services to restore your water pressure.

Call Cahill for Plumbing Repairs

Low water pressure might seem like a minor annoyance, but it can be a sign of deeper issues in your plumbing system. Cahill Heating, Cooling, Electric, Plumbing & Sewer has been serving the greater Chicago area for over 50 years with expert diagnosis, honest plumbing solutions, and fast, high-quality service. Count on our licensed plumbers to help you fix low water pressure and keep your plumbing flowing smoothly!

Schedule plumbing repairs in the greater Chicago area with Cahill today and get your water pressure back on track!