How To Increase Water Pressure In A House | A Simple Fix

A weak stream from the kitchen faucet or showerhead is one of the more frustrating household problems. Most people assume it means a major plumbing issue or a call to the water company.

But low water pressure often has a simple fix. This article walks you through the steps to diagnose and increase water pressure in your house, from cleaning fixtures to adjusting the pressure regulator.

Start With the Most Common Culprits

Before calling a plumber, check the easiest targets. Sink aerators and showerheads can accumulate mineral deposits that restrict flow. Cleaning them often restores pressure without any tools.

Unscrew the aerator and rinse it under running water. For stubborn buildup, soak the part in vinegar overnight. This dissolves calcium and lime deposits that narrow the openings.

Check All Shut-Off Valves

Also check that all shut-off valves are fully open. A valve that is partially closed can cut water flow to an entire zone or fixture. This is a common oversight after recent plumbing work.

Why Low Pressure Happens — and Why You Should Diagnose First

It helps to understand the root cause before diving into adjustments. Low water pressure can stem from several sources, and the fix depends on the diagnosis. A pressure gauge gives a reliable starting point.

• Clogged fixtures: Mineral buildup in aerators and showerheads is the most common cause. Cleaning them is often the only step needed.
• Partially closed valves: A valve that isn’t fully open restricts flow. Make sure main and fixture valves are fully turned counterclockwise.
• Hidden leaks: A leak anywhere in the plumbing system can siphon pressure. Watch for wet spots or unusually high water bills.
• Faulty pressure regulator: The pressure-reducing valve can wear out over time. When it fails, pressure may drop or fluctuate.
• Well system problems: For well users, a waterlogged pressure tank or dirty switch contacts can cause erratic pressure.

Using a gauge attached to an outdoor spigot or laundry faucet gives an accurate reading. Typical home pressure is between 40 and 60 psi. A sudden loss of pressure across the whole house may indicate a burst pipe or municipal supply issue — check with neighbors first.

Adjusting the Pressure-Reducing Valve (PRV)

If cleaning and valve checks don’t solve the problem, the PRV is the next suspect. This valve is typically located on the main water line near the water meter. It controls the pressure entering your home.

The Spruce explains that adjusting the PRV can often restore normal flow. Turn the adjustment screw clockwise to increase pressure. Go slowly and check with a gauge after each half-turn to avoid over-pressurizing. See its water pressure troubleshooting for a detailed walkthrough.

Using a Pressure Gauge

Over-pressurizing above 80 psi can damage pipes, fixtures, and appliances. If the valve won’t adjust properly or is old, replacement may be necessary. A plumber can handle that job for around $150–$300 depending on access.

A gauge is inexpensive and easy to use. If you don’t have one, they run about $10 at a hardware store. Taking a reading takes less than a minute.

When You Have a Well System

Well systems operate differently from municipal water. Low pressure often comes from the pump or tank rather than the supply line. A pressure gauge on the tank drain valve can show if the tank is waterlogged.

1. Check the pressure tank: A waterlogged tank loses its air cushion, causing the pump to cycle rapidly. Draining the tank or replacing it can restore steady pressure.
2. Inspect the pressure switch: Dirty or burnt contacts can prevent the pump from turning on at the correct pressure. Cleaning the contacts with sandpaper may fix it.
3. Adjust cut-in and cut-out settings: The switch controls when the pump starts (cut-in) and stops (cut-out). Most systems use 30/50 or 40/60 psi ranges; adjust the nuts on the switch spring accordingly.
4. Consider a booster pump: If the tank and switch are fine but pressure is still low, a booster pump installed on the main line can raise pressure throughout the house.

These adjustments require some familiarity with electrical and plumbing components. If you’re not comfortable working with the pressure switch, a well service professional can make the adjustments safely.

What to Do If the Problem Is Widespread

If low pressure affects the entire house suddenly, it could be a major leak, a burst pipe, or a problem with the municipal supply. Check with neighbors to see if they are experiencing the same issue. Also look at your water meter — if it’s spinning when no water is running, a hidden leak is likely.

Persistent low pressure may be due to mineral buildup inside pipes. Per Lowe’s guide, soaking fixtures in vinegar can dissolve deposits. For severe buildup, professional hydro-jetting might be needed.

If only one fixture is affected, the problem is likely a clogged aerator, faulty cartridge, or partially closed fixture valve. Replacing the cartridge or cleaning the aerator usually resolves it.

If you’ve tried these steps and pressure hasn’t improved, a professional can inspect for pipe corrosion or blocked lines. Hydro-jetting or pipe descaling can restore full flow.

The Bottom Line

Low water pressure usually has a straightforward fix. Start with cleaning fixtures and checking valves before moving to regulator adjustments. For well systems, inspect the tank and pressure switch.

If your pressure remains low after trying these steps, a licensed plumber can check for pipe corrosion or blocked lines specific to your home, and recommend the right solution for your plumbing setup.