What you can do right now to raise water pressure

You can increase water pressure without a pump by cleaning or replacing your water meter screen, opening the main shut-off valve all the way, clearing mineral buildup from aerators and showerheads, and checking for leaks that waste pressure. These are the first steps because they cost nothing and often work. If your pressure is genuinely low across the whole house—below 40 pounds per square inch (psi)—these fixes may not be enough, but they will tell you whether the problem is something you caused or something in your supply line.

The reason to try these first: a pump is expensive and permanent. If your pressure dropped suddenly, something is blocking the line. If it has always been low, your water company may be supplying less than you need, and a pump becomes the only real answer. But most people find the problem is a closed valve, a clogged screen, or mineral deposits that took years to build up.

Key Takeaways

  • The main shut-off valve must be fully open—even a quarter turn closed will cut pressure noticeably, and many homeowners find theirs partially shut without knowing it.
  • The water meter screen, located where the supply line enters your house, clogs with sediment and is the single most common cause of low pressure that a homeowner can fix.
  • Mineral deposits inside aerators and showerheads reduce flow; unscrewing and soaking them in vinegar for a few hours usually restores pressure to those fixtures.
  • If pressure is low in only one room or one fixture, the problem is local to that line; if it is low everywhere, the problem is in your main supply or meter.
  • Leaks waste pressure and make the system work harder; finding and fixing them will improve pressure throughout the house.

Locate and fully open your main shut-off valve

The main shut-off valve controls all water entering your house. It is usually located where the water line comes in from the street—often in the basement, crawl space, or utility room near the foundation. Look for a valve on the pipe that comes from outside. It may be a gate valve (a wheel you turn) or a ball valve (a lever you push).

Turn the valve all the way open. If it is a wheel, turn it counterclockwise until it stops. If it is a lever, align it with the pipe so it points straight along the line. Even a quarter turn closed will reduce pressure noticeably. Many homeowners find theirs partially shut because someone turned it during a repair and never opened it all the way again. If the valve is stuck or will not turn, do not force it—call a plumber, because forcing it can break the valve and leave you unable to shut off water in an emergency.

After opening it, check your pressure at a sink faucet. If pressure improved, you have found your problem. If not, move to the next step.

Clean or replace the water meter screen

The water meter screen is a small mesh filter where the water line enters your house, just before or after the meter itself. It catches sediment from the water main and prevents it from clogging your pipes. Over years, this screen fills with sand, rust, and mineral particles and becomes a bottleneck that chokes off pressure.

To access it, locate your water meter—usually in the basement, utility room, or outside in a box in the ground. The screen is a removable cartridge or cage just upstream of the meter. Turn off the main shut-off valve, then unscrew the screen housing (it is usually a large hexagonal nut). Pull out the screen and hold it up to light. If you cannot see through it, it is clogged.

Rinse the screen under running water or soak it in white vinegar for 30 minutes to dissolve mineral buildup. If it is still blocked or damaged, replace it with a new one of the same size—they cost $10 to $30 and are available at any hardware store. Screw the housing back on, open the main valve, and test pressure again. This single fix solves low pressure in roughly half of the cases where homeowners call a plumber.

Remove mineral deposits from aerators and showerheads

Aerators are the small screens at the end of faucet spouts. Showerheads have similar internal screens. Mineral deposits—usually calcium and magnesium from hard water—build up inside these screens and restrict flow. If pressure is low at only one or two fixtures but normal everywhere else, this is almost certainly the cause.

Unscrew the aerator or showerhead by hand or with a wrench. Soak it in white vinegar for 2 to 4 hours, or overnight for heavy buildup. Use an old toothbrush to scrub away loosened deposits. Rinse thoroughly under running water, then screw it back on. If the aerator is damaged or has holes that do not line up, replace it—they cost $3 to $8.

For showerheads, the same method works, but if soaking does not help, you can also use a thin wire or paper clip to carefully poke out mineral plugs from the spray holes. Do this gently to avoid enlarging the holes unevenly.

Check for leaks that waste pressure

A leak anywhere in your system wastes pressure and makes the water heater and main line work harder. Even a small drip from a toilet tank or a pinhole leak in a hidden pipe reduces pressure throughout the house. Finding and fixing leaks will improve pressure and save water.

Start with the obvious: check under sinks, around the water heater, and in the basement for wet spots or dripping. Listen for running water when all fixtures are off—if you hear it, water is leaking somewhere. Check your water meter: note the reading, turn off all water for an hour, then check again. If the meter moved, you have a leak.

For leaks you can see—a dripping faucet, a sweating pipe, a wet wall—fix them yourself if you can or call a plumber. For hidden leaks, a plumber with a leak detection tool can usually find them. The cost of finding and fixing a leak is usually less than the cost of a pump, and it solves the problem permanently.

Understand when pressure is low everywhere versus one fixture

Where the problem is tells you what is causing it. If pressure is low at every faucet and showerhead in the house, the problem is in your main supply line, meter, or shut-off valve—the fixes above are the right place to start. If pressure is low at only one sink or shower, the problem is in that branch line or fixture, and cleaning the aerator or showerhead will usually solve it.

If you have fixed the main valve, cleaned the meter screen, and cleared the aerators, but pressure is still low everywhere, the problem is likely in your water company's supply line or your house's main line is partially blocked by mineral buildup or corrosion inside the pipes. At this point, a plumber can run a pressure test to confirm what you are dealing with. They can also use a water softener to slow mineral buildup, which helps over time but does not fix existing low pressure.

When to call a plumber instead of installing a pump

If pressure is below 40 psi after you have tried the steps above, a plumber should diagnose the cause before you consider a pump. They will test pressure at the meter to see whether the problem is your supply line or your house's internal plumbing. They can also check for leaks, corrosion, or blockages that a pump would only mask, not fix.

A pump is the right solution if your water company supplies low pressure and you have ruled out all other causes. But a pump adds cost, maintenance, and complexity. A plumber can tell you whether your situation actually needs one or whether something simpler will work. They can also advise on a pressure tank, which stores water at pressure and reduces the pump's workload.

Frequently Asked Questions

Why did my water pressure drop suddenly?

Sudden pressure loss usually means a valve was accidentally closed, the meter screen clogged, or a leak started. Check the main shut-off valve first—it is the fastest thing to rule out. If that is open, the meter screen is the next most likely culprit. If neither of those is the problem, you have a leak somewhere in the line.

Can I clean the meter screen myself, or do I need a plumber?

You can do it yourself if you are comfortable with basic tools and turning off the water. The screen housing is usually a large nut you can unscrew by hand or with a wrench. If the nut is stuck or you are not sure where the meter is, call a plumber—it is a quick job and costs less than a service call for other repairs.

Will a water softener increase pressure?

No. A water softener removes minerals that cause buildup, which slows future pressure loss, but it does not increase pressure that is already low. It also adds a small amount of resistance to the line. If you have low pressure now, fix the when ready cause first, then consider a softener to prevent the problem from returning.

What pressure should I have, and how do I measure it?

Most homes have 40 to 80 psi. You can measure it with a pressure gauge, which screws onto an outdoor faucet or a hose bib—they cost $10 to $20 at hardware stores. If you are below 40 psi, the problem is worth investigating. If you are above 80 psi, you may actually have too much pressure, which can damage fixtures and is a separate issue.

If nothing works, how much does a pressure pump cost?

A whole-house pressure pump typically costs $1,500 to $3,000 installed, depending on the type and your plumber's rates. Before spending that, have a plumber confirm that low pressure is actually your water company's supply pressure and not a problem in your house's plumbing. A pump is a permanent solution, but it is also a significant investment, so make sure it is the right answer first.