How to Increase Water Pressure in Your Well System

Check Your Pressure Tank and Gauge First

Low water pressure in a well system usually comes from one of three places: the pressure tank, the pump itself, or a blockage in the pipes. Before you call a plumber, you can test the tank and gauge in about ten minutes with no tools except a tire pressure gauge.

Find your pressure tank—it's the metal cylinder, usually 20 to 80 gallons, connected to your well pump. Look for a small air valve on top, similar to a car tire valve. Using a tire pressure gauge, check the air pressure inside the tank when the pump is off and the tank is full. Write down the number. Your well system should be set to maintain pressure between 40 and 60 pounds per square inch (PSI), with the tank pre-charged to about 2 PSI below your system's cut-in pressure. If your system is set to cut in at 40 PSI, the tank should read roughly 38 PSI when empty.

If the tank reads zero or very low, it has lost its air charge. This is the most common cause of weak pressure and the easiest to fix yourself. If the gauge on the side of your tank shows pressure dropping below your system's minimum, the tank needs air or repair.

Key Takeaways

A pressure tank that has lost its air charge is the most common reason for low water pressure and can be recharged with a bicycle or tire pump in minutes.
Your pressure tank should hold air at 2 PSI below your system's cut-in pressure—usually around 38 PSI for a 40/60 system.
If your pump runs constantly or cycles on and off rapidly, the tank is waterlogged and needs to be drained and recharged.
A clogged sediment filter or mineral buildup in pipes can reduce pressure throughout the house, and replacing or cleaning the filter is a straightforward first step.
If pressure is low at only one faucet or fixture, the problem is local to that line, not your well system.

Recharge the Pressure Tank with Air

If your tank pressure is low, you can recharge it yourself using a bicycle pump or an air compressor. Turn off the pump at the pressure switch or breaker. Open a faucet somewhere in the house to release pressure from the tank—you'll hear air hiss out. Close the faucet once the hissing stops.

Attach your pump or compressor to the air valve on top of the tank. Pump air in until the gauge reads 2 PSI below your system's cut-in pressure. For a standard 40/60 system, pump until it reads 38 PSI. Do not over-inflate; too much air pressure can damage the tank or reduce its water capacity. Once you've added air, turn the pump back on and let it run until it reaches your system's cut-out pressure (usually 60 PSI). The pressure should now hold steady.

If the tank loses air pressure again within a few days or weeks, the tank itself has a leak or the internal bladder has failed. A failed bladder cannot be repaired and the tank will need replacement. A plumber can confirm this with a more detailed pressure test.

Drain and Flush a Waterlogged Tank

If your pump runs constantly or cycles on and off every few seconds, your pressure tank is waterlogged—the internal air bladder has ruptured or the air has been absorbed into the water. The tank is now full of water instead of the air-water mix it should contain, so it cannot store pressure.

To drain and recharge the tank, turn off the pump. Locate the drain valve at the bottom of the tank (a small spigot or ball valve). Attach a hose and open the valve to drain all water from the tank into a bucket or floor drain. This may take several minutes. Once empty, close the drain valve.

Now recharge the tank with air as described above. Turn the pump back on. If the pump still cycles rapidly after recharging, the tank bladder is damaged and the tank needs replacement. This is not a repair you can do yourself, but a plumber can install a new tank in a few hours.

Replace or Clean Your Sediment Filter

Well water often carries fine sediment, minerals, and rust particles that can clog your system's sediment filter. A clogged filter restricts water flow and reduces pressure throughout your house. Check your filter cartridge every three to six months, depending on how much sediment your well produces.

Locate your filter housing—it's usually a tall cylindrical tank near your pressure tank or pump. Turn off the pump. Open the drain valve at the bottom of the housing to release pressure, then unscrew the filter bowl (the large nut at the bottom). Pull out the cartridge and inspect it. If it's visibly clogged with brown or tan sediment, it needs replacement. Buy a replacement cartridge that matches your filter model number (printed on the housing). Insert the new cartridge, screw the bowl back on, and turn the pump back on.

If your filter is only lightly soiled, you can rinse it under running water and reinstall it. Do not use high-pressure water or compressed air, as these can tear the filter media. If you replace the filter and pressure is still low, the problem lies elsewhere in your system.

Check for Mineral Buildup and Pipe Blockages

Over time, minerals from well water can accumulate inside pipes and reduce flow. If pressure is low everywhere in the house but your tank and filter are in good condition, mineral buildup or a blockage in the main line may be the cause.

One way to test this is to open an outdoor faucet or hose bib closest to your pressure tank. If pressure is normal there but weak inside the house, the blockage is in the interior plumbing. If pressure is weak at the outdoor faucet too, the problem is in the main line between the tank and the house.

Mineral buildup in pipes is difficult to clear without professional equipment. A plumber can use a water jetting service to flush the lines, or in severe cases may need to replace sections of pipe. If you have very hard water (high mineral content), installing a water softener can prevent future buildup and improve pressure over time.

Inspect the Well Pump and Pressure Switch

If your tank is charged, your filter is clean, and you have no blockages, the problem may be in the pump itself or the pressure switch that controls it. The pressure switch tells the pump when to turn on and off based on tank pressure. If the switch is set too low, the pump will not build enough pressure.

Look at your pressure switch—it's a small box mounted on or near the pressure tank with two adjustment screws inside. The lower screw controls the cut-in pressure (when the pump starts), and the upper screw controls the differential (the gap between cut-in and cut-out). Do not adjust these yourself unless you are confident in your ability; incorrect adjustment can damage the pump or create unsafe pressure levels. A plumber can check and adjust the switch in minutes.

If the pump itself is failing, you may hear it struggling to build pressure, or it may run but produce very little water. Pump failure requires professional replacement and is beyond a homeowner repair.

When to Call a Professional

You should contact a well service plumber if recharging the tank, cleaning the filter, and checking for obvious blockages do not restore pressure. Also call if the tank loses air pressure repeatedly, the pump runs constantly, or you hear unusual noises from the pump or tank.

A well service plumber has specialized equipment to test pump output, measure actual water flow, and diagnose pressure switch problems. They can also perform a full system pressure test to pinpoint exactly where pressure is being lost. The cost of a service call is usually between $150 and $300, and most repairs (tank recharge, filter replacement, switch adjustment) take less than an hour.

Frequently Asked Questions

How much air pressure should my well tank have?

Your tank should be pre-charged to 2 PSI below your system's cut-in pressure. For a standard 40/60 system, that means 38 PSI when the tank is empty. Check your pressure switch or system documentation to confirm your cut-in pressure, then subtract 2 PSI.

Can I use a regular air compressor to fill my pressure tank?

Yes, a standard air compressor works fine. Attach it to the air valve on top of the tank and pump until you reach the correct pressure. Do not over-inflate; stop as soon as your gauge reads the target PSI. An over-pressurized tank can rupture or reduce its water storage capacity.

Why does my pump run all the time even after I recharged the tank?

Constant running usually means the tank is waterlogged or the pump is leaking. Drain the tank completely, recharge it with air, and turn the pump back on. If it still runs constantly, the internal bladder is damaged and the tank needs replacement.

Is low pressure at one faucet the same problem as low pressure everywhere?

No. If only one faucet or shower has weak pressure, the problem is local to that fixture or its supply line—a clogged aerator, a shut valve, or a blockage in that branch of pipe. Check that the shut-off valve under that sink is fully open, and unscrew the faucet aerator to see if it's clogged with sediment.

How often should I check my pressure tank?

Check the air pressure in your tank once a year, ideally in spring before heavy water use begins. If you notice pressure dropping or the pump cycling more than usual, check it when ready. A healthy tank should hold its air charge for years without loss.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.