How to Increase Water Pressure in Your House: 7 Checks
How to increase water pressure in your house: test it with a gauge, then check the main valve, aerators, regulator, old pipes and supply before buying a pump.
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How to increase water pressure in your house starts with measuring it, because the right fix depends on whether the problem is the whole house or one fixture. A cheap gauge on an outdoor tap tells you the truth in a minute. Then work through the checks below, from free to costly, before you buy a booster pump.
How to increase water pressure in your house: test first
Screw a water pressure gauge onto an outdoor tap or washing machine hose bib, close all other taps, and open the tap fully. Typical household pressure sits between about 40 and 80 psi. Below that range you will notice weak showers. Above it you risk stressing pipes and appliances, so do not simply push the pressure up.
| Quick facts: how to increase water pressure in your house | |
|---|---|
| Time needed | 10 minutes to test; longer to fix |
| Tools | Pressure gauge, screwdriver, pliers |
| Typical healthy range | About 40 to 80 psi |
| Do not | Raise pressure past the limit your appliances recommend |
Seven checks, easiest first
- One fixture or all of them? If only one tap or shower is weak, clean or replace its aerator or shower head. Mineral scale blocks the small holes.
- Is the main shut-off fully open? The valve where water enters the house, and the meter valve, should both be open all the way. A half-open valve restricts the whole house.
- Ask your neighbours. If the whole street is weak, the cause is the utility supply. Call your water company.
- Check the pressure regulator. Many homes have a pressure-reducing valve on the main line, shaped like a bell. If the gauge reads low, it may be set too low or worn, and a plumber can adjust or replace it.
- Look for a leak. A hidden leak between the meter and the house lowers pressure and raises the bill. Turn everything off and see whether the meter still moves.
- Consider the pipes. Old galvanized steel pipes clog internally with rust and scale, restricting flow. Replacing them restores pressure.
- Check the water heater side. If only the hot side is weak, a partly closed valve or sediment in the heater is the likely cause.
Symptoms and likely causes
| What you notice | Likely cause |
|---|---|
| One tap weak | Clogged aerator or valve |
| Everything weak, suddenly | Partly closed main valve, regulator failure or leak |
| Gradually weaker over years | Corroded galvanized pipes |
| Hot only is weak | Water heater valve or sediment |
| Pressure swings or hammering | Faulty regulator or worn valves |
How to clean an aerator or shower head
Unscrew the aerator from the tap spout, or the shower head from the arm, using a cloth to protect the finish. Soak the part in white vinegar for an hour, brush the holes with an old toothbrush, rinse, and refit it. This is the cheapest answer to how to increase water pressure in your house at a single fixture, and it often works.
When a booster pump makes sense
If your supply pressure is good but flow is poor in a tall or distant house, or if your water comes from a private well, a booster pump or a properly set pressure tank can help. Have a plumber size it, because a pump on a weak supply may only mask a leak or a restricted pipe.
What not to do
- Do not remove the pressure regulator to get more pressure; high pressure shortens the life of hoses, valves and appliances.
- Do not ignore a pressure gauge that creeps up overnight, which suggests a failing regulator.
- Do not assume the street is at fault before you have checked your own valves.
Keeping pressure healthy
Clean aerators and shower heads twice a year, exercise the main valve occasionally so it does not seize, and have the regulator checked if you notice sudden changes. Knowing how to increase water pressure in your house safely means knowing the safe range for your fixtures, not chasing the highest number. Write down your gauge reading and the date; if it changes by more than 10 psi later, something has altered: a valve, the regulator or the supply. A second reading at a different outdoor tap helps rule out a clogged branch line.
Related reading
- Hot Water Runs Out Quickly? 7 Causes and Fixes
- Outdoor Faucet Leaking? Find the Leak, Fix It, Winterize
- Complete Guide: What to Do When a Pipe Bursts in Your House
- How to Unclog a Shower Drain: Hair Clogs, Step by Step
Browse all plumbing guides, or find a plumber in your city from the plumbing directory.
Frequently asked questions
How do I check water pressure at home?
Attach a water pressure gauge to an outdoor tap or hose bib, close all other taps, open the tap fully, and read the dial. Typical household pressure is roughly 40 to 80 psi. Low or high readings point to the cause of the problem.
Why is my water pressure suddenly low in the whole house?
Sudden loss across the house points to a partly closed main valve, a failed pressure regulator, a leak, or a supply problem from your utility. Check the valve and ask your neighbours before you call a plumber. A gauge reading tells you which of these it is.
How to increase water pressure in your house if the pipes are old?
Old galvanized pipes clog with rust and scale, so cleaning will not last. Repiping the affected sections with copper or PEX restores flow. A plumber can inspect the pipes and advise which sections actually need work. Replacement is usually staged, so ask which runs matter most.
Is a water pressure booster pump a good idea?
It can help when supply pressure is good but flow is poor, or on a private well. It is not a cure for leaks or a clogged main, and a plumber should size it to your household demand.
Can a clogged aerator cause low water pressure?
Yes, at that one tap. Mineral scale blocks the small holes in the aerator. Unscrew it, soak it in vinegar, brush it clean, and refit it. If pressure at other taps is normal, the aerator was the problem.
What does a pressure regulator do?
It reduces the pressure of the incoming supply to a safe level for your pipes and appliances. When it wears out, pressure can drop too low or climb too high. A plumber can test and adjust or replace it.
Can a leak cause low water pressure?
Yes. A leak in the line between the meter and the house, or inside a wall, diverts water and lowers pressure. Turn off every tap and watch the meter. If it keeps moving, you probably have a leak.
Is high water pressure a problem?
Yes. Pressure above roughly 80 psi stresses pipes, hoses, valves and appliances, and can cause hammering and leaks. A gauge on an outdoor tap shows if yours is high, and a regulator can bring it down. Many homes have a regulator that can be adjusted.
Can the pressure regulator be adjusted?
Yes. Most regulators have an adjusting screw or bolt under the bell housing. Turn it clockwise slightly to raise pressure, test with a gauge and stay under about 80 psi.
What is a good water pressure for a home?
Most homes work well between about 40 and 60 psi, with 80 psi as the maximum before risks rise. A gauge on an outdoor spigot shows your pressure. Pressure above this range can damage appliances and fittings, so consider a regulator if your gauge reads high.
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