Check Your Pressure Tank Settings First

The fastest way to raise water pressure is to adjust the air charge in your pressure tank—the metal cylinder that stores water and air under pressure. Most residential well systems use a bladder tank, which has a rubber bladder inside that separates air from water. When you turn on a faucet, the compressed air pushes water out. As pressure drops, the pump kicks in to refill the tank and re-pressurize it.

Your tank has two pressure settings: the cut-in pressure (when the pump starts) and the cut-out pressure (when the pump stops). If your system is set to cut in at 30 psi and cut out at 50 psi, water pressure at your faucets will be roughly 30 to 50 psi. To raise pressure, you increase both numbers equally—typically by 10 psi at a time.

Locate the air valve on top of your pressure tank (it looks like a tire valve). Use a tire pressure gauge to check the current air pressure. The air pressure should be about 2 psi below your cut-in pressure. If it reads lower than that, the bladder may be waterlogged, and you will need to drain and re-pressurize the tank or replace the bladder.

Key Takeaways

  • Pressure tank air charge is the first thing to check—most low-pressure problems come from air that has leaked out or a waterlogged bladder.
  • You can raise cut-in and cut-out pressures by 10 psi at a time using a pressure switch adjustment, but never exceed the tank's rated maximum pressure.
  • A failing pump that cannot reach its rated pressure, or a clogged intake line, requires professional inspection and may need replacement.
  • Sediment in the well, a broken check valve, or a leaking pressure tank can all cause pressure loss and need different fixes.
  • Pressure should be tested at the tank gauge and at a faucet—a big difference between the two points to a leak in your house lines.

Adjust the Pressure Switch to Raise Cut-In and Cut-Out Points

The pressure switch is a small box mounted on or near the pressure tank. It has two adjustment screws: one for cut-in pressure (the lower setting) and one for the pressure differential (the gap between cut-in and cut-out). Turning the lower screw clockwise raises cut-in pressure; turning the upper screw clockwise increases the differential, which raises cut-out pressure.

Before you adjust anything, turn off power to the pump at the breaker. Drain the tank by opening a faucet until water stops flowing. Use a flathead screwdriver to turn the lower screw one-quarter turn clockwise. This raises cut-in by roughly 2 psi. Close the faucet, turn the power back on, and let the pump run until it shuts off. Check the gauge on the tank to see the new cut-out pressure. If you need higher pressure, repeat in quarter-turn increments.

Do not raise pressure above the tank's rated maximum—this is stamped on the tank itself, usually 60 or 80 psi for residential systems. Exceeding it risks rupturing the tank or damaging the pump. Most household needs are met at 40 to 60 psi, so start conservatively and test water flow at your faucets before making large jumps.

Drain and Re-Pressurize a Waterlogged Pressure Tank

If your air pressure gauge reads zero or very low (below 10 psi), the bladder inside the tank has likely failed and water has filled the air chamber. A waterlogged tank cannot store pressure and will cause the pump to cycle on and off constantly, even when you are not using water. The fix is to drain the tank completely and re-pressurize it with a hand pump or air compressor.

Turn off the pump at the breaker. Open the lowest faucet in your house (usually a basement or outdoor spigot) and let water drain until it stops. Open the drain valve at the bottom of the pressure tank if one exists, or disconnect the tank and drain it manually. Once empty, use a tire pump or air compressor to add air through the valve on top of the tank. Pump until the gauge reads 2 psi below your desired cut-in pressure—for example, 28 psi if you want cut-in at 30 psi.

Close the air valve, reconnect the tank if you removed it, and turn the pump back on. Let it run until it reaches cut-out pressure, then test a faucet. If pressure is now normal, the bladder was straightforward deflated. If pressure still will not build, the bladder has ruptured and the tank needs replacement—this is not a repair you can do yourself.

Inspect the Well Intake Line and Check Valve

If pressure is low throughout the house and the tank is properly pressurized, the problem may be upstream—in the well itself or in the line running from the well to your pump. The check valve is a one-way valve that prevents water from flowing backward into the well when the pump shuts off. A stuck or leaking check valve will cause pressure to drop as soon as the pump stops.

To test the check valve, turn off the pump and open a faucet. Water should stop flowing when ready. If water continues to trickle out for several seconds, the check valve is leaking and needs replacement. This is a job for a well service technician—the check valve is usually buried or located deep in the well casing.

Sediment in the well can also block water flow and reduce pressure. If your water looks cloudy or sandy, or if pressure has dropped gradually over months, sediment may be clogging the intake screen at the bottom of the well. A well service company can pull the pump and clean or replace the intake screen. This is not a DIY task unless you have experience working with well equipment.

Look for Leaks in Your House Water Lines

A large gap between the pressure reading at the tank gauge and the pressure at your faucets (measured with a faucet pressure gauge) points to a leak somewhere in your house lines. Water is escaping before it reaches your taps, so pressure drops along the way. Check under sinks, in the basement, and along any visible pipes for wet spots or dripping water.

Small leaks may not be obvious. If you suspect a leak but cannot see one, turn off all faucets and appliances, then watch your pressure gauge. If it drops steadily without the pump running, water is leaking somewhere in your lines. Leaking pipes or fittings need to be repaired or replaced by a plumber—this is beyond the scope of pressure adjustment.

Test Pump Output and Consider Replacement

If you have adjusted the pressure switch, re-pressurized the tank, and checked for leaks, but pressure is still low, your pump may be failing. A pump that cannot reach its rated pressure even at maximum switch settings is losing its ability to compress water. This happens gradually as the pump wears out, usually after 10 to 15 years of use.

To confirm a failing pump, a well service technician will measure the flow rate (gallons per minute) and the maximum pressure the pump can achieve. If the pump is undersized for your household demand or has worn seals, replacement is the only fix. Pump replacement is a specialized job—do not attempt it yourself.

Before replacing the pump, also ask the technician to check the pressure switch itself. A faulty switch may prevent the pump from running at all or from reaching full pressure. Replacing a switch is much cheaper than replacing a pump and should be ruled out first.

Frequently Asked Questions

What pressure should my well pump be set to?

Most residential systems are set to cut in at 30 psi and cut out at 50 psi, giving you roughly 30 to 50 psi at your faucets. If you want higher pressure, 40 psi cut-in and 60 psi cut-out is common. Never exceed the maximum pressure rating stamped on your tank, usually 60 or 80 psi.

Can I adjust pressure myself, or do I need a technician?

Adjusting the pressure switch screws is something a homeowner can do safely if you turn off power first and make small changes. However, if the pump will not build pressure, the check valve is leaking, or you suspect a failed bladder, call a well service company. These problems require specialized tools and knowledge.

Why does my pump run constantly even when I am not using water?

Constant cycling usually means the pressure tank is waterlogged or the check valve is leaking. Both cause pressure to drop when ready after the pump shuts off, so the pump restarts right away. Drain and re-pressurize the tank first; if that does not fix it, the check valve needs replacement.

How do I know if my pressure tank is failing?

A waterlogged tank will have zero or very low air pressure when you check the valve on top. You may also notice the pump cycling on and off every few seconds, or pressure dropping rapidly when you use water. If re-pressurizing does not help, the bladder has ruptured and the tank must be replaced.

What is the difference between a pressure tank and a pressure switch?

The pressure tank stores water and air under pressure; the pressure switch is the control box that tells the pump when to start and stop. The tank holds the pressure steady between pump cycles. The switch sets the cut-in and cut-out points. Both are needed for a working well system.