You can measure your water pressure with a straightforward gauge that costs $10 to $20

Water pressure is measured in pounds per square inch, or PSI. Most homes run between 40 and 80 PSI, and your water company typically delivers it at 50 to 60 PSI. You check it by screwing a pressure gauge onto an outdoor faucet or a laundry room spigot — the same way you'd attach a garden hose. The gauge reads your pressure in seconds. You don't need a plumber, special training, or an appointment. A basic gauge takes five minutes and tells you whether your pressure is normal, too high, or too low.

The reason to check is practical: water pressure that's too high wears out pipes and fixtures faster and can damage appliances. Pressure that's too low means weak showers and slow-filling bathtubs. If you notice either problem, knowing your actual PSI tells a plumber what to fix instead of guessing.

Key Takeaways

  • A water pressure gauge screws onto an outdoor faucet or laundry spigot and costs $10 to $20 at any hardware store.
  • Normal household water pressure ranges from 40 to 80 PSI, with 50 to 60 PSI being typical from most water companies.
  • The gauge reading takes less than a minute once it's attached, and you can check multiple faucets to see if pressure varies in your home.
  • Pressure above 80 PSI can damage pipes and appliances over time; pressure below 40 PSI usually means a problem with your supply line or regulator.

What you need to buy and where to find it

A water pressure gauge is a small brass or plastic device with a dial face and a threaded connection. Look for one labeled "0–100 PSI" or "0–200 PSI" — either works for home use. Hardware stores like Home Depot, Lowe's, and Ace carry them in the plumbing section, usually near hose attachments and faucet repair kits. You can also order one online from Amazon or a plumbing supply site. Expect to pay $10 to $25 for a basic model; fancier digital gauges run $30 to $50 but aren't necessary for a one-time check.

Buy a gauge with a female threaded connection (the opening that screws onto a male faucet outlet). Most outdoor faucets and laundry spigots have male threads, so this is the standard fit. If you're unsure, bring a photo of your faucet to the store or ask a staff member.

Step-by-step: how to attach the gauge and read it

Step 1: Turn off all water use in your home. Close every faucet, toilet, and appliance that uses water. Wait two minutes. This gives the pressure in your pipes time to stabilize so you get an accurate reading. If someone is using water while you measure, the pressure will drop and you'll get a false low reading.

Step 2: Choose your test location. Use an outdoor faucet (the one you attach a garden hose to) or a laundry room spigot. Avoid indoor kitchen or bathroom faucets because they often have aerators (screens that slow water flow) that can interfere with the reading. If you have a frost-proof outdoor faucet, that's ideal.

Step 3: Screw on the gauge. Turn the gauge clockwise onto the faucet outlet by hand. Tighten it snugly but don't force it — you're not trying to crush it. If it won't thread, the connection doesn't match; try a different faucet or buy an adapter at the hardware store.

Step 4: Turn on the faucet fully. Open the valve all the way. The needle on the gauge dial will jump to a number. That number is your water pressure in PSI. Leave the faucet open for 10 to 15 seconds to make sure the reading is steady, then turn it off.

Step 5: Record the number and turn off the gauge. Write down the PSI reading. Turn the faucet off, unscrew the gauge, and you're done. The whole process takes about five minutes.

What your reading means

A reading between 40 and 80 PSI is normal and healthy. Most water companies aim for 50 to 60 PSI because that's the sweet spot — strong enough for showers and washing machines, but not so high that it stresses pipes and seals. If your reading falls in this range, your water pressure is fine and you don't need to do anything.

A reading above 80 PSI means your pressure is too high. High pressure wears out rubber washers in faucets, stresses pipe joints, and can damage water heaters and dishwashers over time. It also wastes water. If you're consistently above 80 PSI, you may have a faulty pressure regulator (a valve that sits where the water line enters your home) or your water company may be delivering pressure that's too high. Call your water company first — they can tell you what they're sending. If they say it's normal on their end, a plumber can install or adjust a pressure regulator, which usually costs $300 to $500.

A reading below 40 PSI means your pressure is too low. This shows up as weak shower spray, slow-filling bathtubs, or a washing machine that takes forever to fill. Low pressure can come from a clogged water line, a failing pressure regulator, a leak somewhere in your system, or a problem at the water company. Check with your neighbors first — if their pressure is normal, the problem is in your home and you'll need a plumber to find it. If their pressure is also low, contact your water company.

Checking pressure at different faucets

Water pressure can vary between faucets in the same home. If you want a fuller picture, check at least two locations — one outdoor faucet and one indoor faucet like a laundry spigot. Write down both readings. A difference of 5 to 10 PSI is normal. A difference of 20 PSI or more between locations suggests a problem in your plumbing — maybe a partially blocked pipe or a failing check valve — and you should call a plumber.

If you're checking an indoor faucet, remove the aerator first (the screen at the tip). Unscrew it by hand or with pliers, then screw the gauge onto the faucet outlet directly. This gives you a true reading without the aerator slowing flow.

Common mistakes to avoid

The biggest mistake is checking pressure while water is running elsewhere in the house. If someone flushes a toilet or starts a shower while you're measuring, the pressure drops when ready and you'll think you have a problem when you don't. Turn off all water use and wait two minutes before you start.

Another common error is checking at an indoor faucet with the aerator still attached. The aerator restricts flow and gives you a falsely low reading. Always remove it first, or use an outdoor faucet instead.

Don't over-tighten the gauge. Hand-tight is enough. If you crank it hard, you can crack the gauge or damage the faucet threads, and then you've got a leak to fix.

Finally, don't assume one reading tells the whole story. Pressure can fluctuate during the day — it's often higher early morning and lower in the evening when demand is high. If you're concerned about consistently high or low pressure, check at different times over a few days.

When to call a plumber

If your reading is consistently above 80 PSI and your water company says their delivery pressure is normal, a plumber can install a pressure regulator or adjust an existing one. This is a straightforward job that usually takes an hour.

If your reading is below 40 PSI and your neighbors have normal pressure, a plumber can check for leaks, blockages, or a failing regulator in your home's water line. Bring your gauge reading with you so they know what they're working with.

If you find a big difference in pressure between faucets (20 PSI or more), that suggests a problem in your internal plumbing that a plumber should investigate.

Frequently Asked Questions

Do I need to turn off the water heater before checking pressure?

No. The pressure gauge measures the incoming water pressure before it reaches the heater, so the heater's state doesn't matter. Just make sure no water is running anywhere in the house while you measure.

Can I check pressure at a kitchen faucet?

You can, but you'll get a more accurate reading at an outdoor faucet or laundry spigot because they don't have aerators. If you must use a kitchen faucet, unscrew the aerator first by twisting the tip counterclockwise by hand or with pliers.

What if the gauge won't screw onto my faucet?

The threads don't match. Buy a threaded adapter at the hardware store — they cost $3 to $5 and come in different sizes. Bring your faucet outlet or a photo to the store and ask for help matching the size.

Is 60 PSI better than 70 PSI?

Both are in the normal range and equally fine for household use. Anything between 40 and 80 PSI works well. If you're at 60 and it feels weak, the problem is probably something else — like a clogged aerator or a leak — not the pressure itself.

How often should I check my water pressure?

Once is usually enough unless you notice a change in water flow or pressure. If you suspect a problem, check again. If you're concerned about high pressure damaging your appliances, checking once a year is reasonable.