Check Your Pressure Tank Settings First

The fastest way to raise water pressure is to adjust the air charge in your pressure tank. Most well systems use a bladder tank — a metal tank with an air chamber separated from the water by a rubber bladder. The air pressure inside this chamber pushes water out to your house. If pressure has dropped, the air charge may have leaked away or fallen below the correct level.

Locate the air valve on top of your pressure tank — it looks like a tire valve on a car. Turn off power to the pump before you start. Use a tire pressure gauge to check the current air pressure. The correct setting is usually 2 pounds per square inch (psi) below your pump's cut-in pressure. If your pump turns on at 30 psi, your tank air charge should be around 28 psi. Check your pump's label or manual for the exact number.

If the reading is low, use an air compressor to add air until you reach the target pressure. Do this with the tank empty — turn on a faucet and let water drain until the pump shuts off, then check and adjust. This single step solves low-pressure problems in many homes and costs nothing if you have a compressor available.

Key Takeaways

  • Adjust the air pressure in your bladder tank to 2 psi below your pump's cut-in pressure using a tire gauge and air compressor.
  • Raise your pump's pressure switch settings if the tank air charge is correct but pressure is still low — typical settings range from 30/50 psi to 40/60 psi.
  • Clean or replace your pressure tank's sediment if water pressure drops suddenly, as mineral buildup can block the outlet.
  • Check for leaks in pipes, faucets, and the check valve, because water escaping the system reduces pressure at your fixtures.
  • If pressure remains low after these steps, the pump itself may be worn and need professional inspection or replacement.

Adjust the Pump's Pressure Switch Settings

If your tank air charge is correct but pressure is still low, the problem may be the pressure switch itself. This switch tells the pump when to turn on and off. It has two settings: the cut-in pressure (when the pump starts) and the cut-out pressure (when it stops). Raising these settings increases the pressure delivered to your house.

The pressure switch is a small box mounted on or near the pressure tank, with two adjustment screws inside. Before touching anything, turn off power to the pump at the breaker. Common factory settings are 30 psi cut-in and 50 psi cut-out, but your system may be set lower. Check your pump manual for the safe range — most residential pumps can handle 40/60 psi or even 50/70 psi without damage.

To raise pressure, use a flathead screwdriver to turn the larger screw (usually labeled "range" or "differential") clockwise. Turn it a quarter turn, restore power, and let the pump run for a minute. Check the pressure gauge on your tank. Repeat in small increments until you reach your target. Never raise settings above what your pump manual allows, and never exceed 80 psi — higher pressure can damage pipes and fixtures.

Drain and Clean Your Pressure Tank

Sediment and mineral buildup inside the pressure tank can block water flow and reduce pressure at your taps. This happens gradually and is straightforward to miss. If pressure dropped slowly over weeks or months rather than suddenly, sediment is a likely cause.

Turn off the pump and open a low faucet to drain the tank completely. Locate the drain valve at the bottom of the tank — it looks like a garden hose connection. Attach a hose and open the valve to let water run out. Once empty, close the drain valve and open the air valve on top. Use a wet/dry vacuum or compressed air to blow out loose sediment from inside.

For heavy buildup, you may need to flush the tank with clean water. Close the air valve, attach a hose to the drain valve, and run water backward through the tank using a garden hose connected to an outdoor faucet. Let it run for several minutes until the water runs clear. Drain again, close the drain valve, and refill by turning the pump back on. Check your pressure gauge — many homeowners see a 5 to 10 psi improvement after cleaning.

Look for Leaks in Your System

A leak anywhere between the pump and your house reduces the pressure that reaches your taps. Even a small leak can lower pressure noticeably over time. Start by checking visible pipes in your basement, crawlspace, or wherever your well line runs. Look for water dripping, pooling, or wet soil around the pipes.

Check the check valve, a one-way valve installed on the discharge line from the pump. If it leaks internally, water will drain back into the well when the pump shuts off, and the pump will have to refill the line before pressure builds again. You may notice pressure drops slowly after you stop using water, or the pump cycles on and off more often than usual. A leaking check valve must be replaced — it cannot be repaired.

Also inspect all visible faucets, toilet tanks, and connections under sinks. A slow leak in a toilet or faucet you do not use often can waste enough water to lower system pressure. Tighten any loose connections with a wrench. If you find a leak in a pipe itself, that section will need to be replaced — call a well contractor for help.

Test Your Well Pump's Output

If pressure is still low after adjusting the tank and switch, the pump itself may be losing power. A well pump that is worn or partially clogged delivers less water and builds pressure more slowly. You can do a straightforward output test without special tools.

Turn on an outdoor faucet or hose bib and let water run for 30 seconds into a bucket. Measure how much water collected. A typical 1-horsepower well pump delivers 5 to 8 gallons per minute. If you collected much less — say, 2 or 3 gallons — the pump is not delivering full flow. This usually means the pump impeller is worn, the intake screen is clogged, or the pump is cavitating (sucking air instead of water).

Cavitation often happens if the water table has dropped and the pump intake is now above the water level. If you live in an area with seasonal water table changes, this is worth checking. A well contractor can measure your water level and tell you if the pump needs to be lowered. If the pump is straightforward old and worn, replacement is usually the only fix.

When to Call a Well Contractor

Some pressure problems require professional help. If you have adjusted the tank air charge and pressure switch, cleaned the tank, found no leaks, and pressure is still low, the pump itself needs inspection. A contractor can test the pump's electrical output, check for cavitation, measure your water table, and determine whether repair or replacement is needed.

Also call a contractor if you hear unusual noises from the pump — grinding, squealing, or rapid clicking — as these often signal internal damage. If pressure fluctuates wildly or the pump cycles on and off every few seconds, the pressure switch may be faulty or the tank bladder may have ruptured. These are not adjustments you can make yourself.

A well contractor visit typically costs $150 to $300 for diagnosis. If the pump needs replacement, budget $1,500 to $3,000 depending on your well depth and pump size. Getting a professional opinion before you spend money on a new pump is usually worth the cost.

Frequently Asked Questions

What is the normal water pressure for a well pump?

Most residential well systems run between 30 and 60 psi. The pump turns on at the cut-in pressure (usually 30 to 40 psi) and shuts off at the cut-out pressure (usually 50 to 60 psi). You feel the difference between these two settings when you use water — pressure drops as you draw water, then the pump kicks in and pressure rises again.

Can I raise my pressure switch settings as high as I want?

No. Check your pump manual for the maximum safe pressure — most residential pumps are rated for 60 to 80 psi. Pushing beyond that can rupture pipes, damage fixtures, and shorten the pump's life. Start with small adjustments and test before going higher.

How do I know if my pressure tank bladder is ruptured?

A ruptured bladder means water and air mix inside the tank, and you lose the cushioning effect that keeps pressure steady. You will notice pressure drops very quickly when you use water, or the pump cycles on and off constantly. The tank will also feel heavy and full of water even when the pump is off. A ruptured bladder tank must be replaced.

Why does my water pressure drop when I use hot water?

Hot water heaters can reduce pressure if they are old or have sediment buildup inside. Cold water enters the heater and hot water leaves it — if the heater is clogged, flow slows. You can try flushing the heater by closing the inlet valve, attaching a hose to the drain valve at the bottom, and running water out until it runs clear. If pressure does not improve, the heater may need replacement.

Is low water pressure a sign my well is running dry?

Not always, but it can be. If pressure dropped suddenly and you live in a drought area or your well is shallow, the water table may have dropped below your pump intake. A well contractor can measure your water level in minutes. If the table is low, the pump may need to be lowered, or you may need to drill a deeper well — both are expensive, so get a professional assessment first.