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How Much Air Pressure Should Be In A Water Tank? (Verified Info 2024)

How Much Air Pressure Should Be In A Water Tank

To keep your well water flowing smoothly, adjust your tank’s air pressure to 2 psi less than the pressure switch’s activation level. The precise setting will depend on the specific pressure settings of your tank.

Your well tank’s air pressure is the key to unlocking the water flow rate.

If the air pressure is too low, the water delivery may be weak or non-existent. On the other hand, if the air pressure is too high, it can cause excessive wear and tear on the tank and its components, potentially leading to leaks or other problems.

Keep reading this detailed guide on how much air pressure level should be in a water tank.

🌬️What Is Good Water Pressure for a Well?

Check Air Pressure using Pressure Gauge

You will need a pressure gauge to check the operating pressure in your water tank. 

You can purchase a standalone gauge or one integrated into an air pressure valve on the tank. To use the gauge, attach it to the valve and take a reading of the water tank pressure.

Here’s a step-by-step guide on how to check correct air pressure in your water tank:

  • Locate the air valve:

    The air valve is usually located on the top of the tank and is a small valve that can be opened and closed with a screwdriver.
  • Attach the pressure gauge:

    To attach the pressure gauge, screw it onto the valve stem of the air valve. Make sure it is securely attached to get an accurate reading.
  • Open the air valve:

    Turn the valve counterclockwise to open it. It will allow air to flow into the gauge, enabling you to measure the pressure.
  • Read the pressure:

    The pressure gauge will have a dial with a needle that indicates the pressure reading. Read the pressure gauge reading and compare it to the recommended range. If the pressure is too low, it will need to be increased. If the pressure is too high, it will need to be decreased.
  • Add or release air as needed:

    If the pressure is too low, you can add air to the tank using an air compressor. Attach the air compressor to the air valve and turn it on. If there is too much pressure, you can release air from the pressure tanks by opening the air valve.
  • Close the air valve:

    When you finish checking the pressure, close the valve by turning it clockwise. Then, remove the pressure gauge and store it for future use.

It’s essential to regularly check the air pressure in your water tank to ensure that it is functioning correctly and to prevent damage to the tank or system.

Also Read: How To Increase Pressure In RO

⚙️How Do I Adjust The Pressure Settings Of My Well Tank? 

Adjust Pressure Settings of a Well Tank

To adjust the pressure settings of your well tank, follow these steps:

  • You need to empty the water from the well tank, so it’s easy to make air pressure adjustments. 
  • Turn off the electricity or switch off the circuit breaker that powers the pump for your safety. 
  • Locate the pressure switch, which is typically mounted near the top of the well tank.
  • Check the tank’s current pressure settings by looking at the pressure gauge or reading the switch. The pressure switch should have a small dial displaying the cut-in/cut-out pressure settings.
  • To adjust the pressure tank settings, you must adjust the screws or nuts on the pressure switch. The pressure at which the pump turns on is controlled by the screw or nut marked “cut-in.” The pressure at which the pump turns off is controlled by the screw or nut marked “cut-out.” Most pressure switches have a single nut that raises both the cut-on pressure and the cut-off pressure at the same time. This keeps the difference between the two pressure switch settings at 20 psi.
  • To increase the pressure, turn the “cut-in” screw clockwise and the “cut-out” screw counterclockwise. To gradually decrease the pressure, turn the “cut-in” screw counterclockwise and the “cut-out” screw clockwise. Finally, turn the nut three and a half times to increase the pressure by 10 psi.
  • Turn the power back on, and let the pump run until the desired pressure is reached.
  • Next, check the pressure gauge or switch to confirm the new pressure settings.
  • Finally, repeat the above steps until you achieve the desired pressure.

Expert Advice:

It’s important to remember that your well tank’s pressure should never exceed the manufacturer’s recommended maximum pressure, or you risk damaging the system. If you face difficulty adjusting the pressure settings, consider hiring a professional plumber or a well-pump specialist.

Also Read: 9 Reasons Why Well Water Fluctuates 

💧Water Pressure Tank Troubleshooting

1️⃣ Waterlogged Pressure Tank 

Waterlogged Pressure Tank


A waterlogged pressure tank occurs when too much air has been discharged. It can happen for several reasons, including overfilling the tank, overuse of water, or a leak in the tank bladder.


To fix a waterlogged pressure tank, you will need to recharge it by adding air to the tank. Here’s how:

  • Turn off the power to the pump.
  • Next, locate the air valve on the top of the tank and remove the cap.
  • Attach an air compressor to the valve and turn it on.
  • Monitor the pressure gauge on the tank until it reaches the recommended pressure setting. Then, turn off the air compressor and replace the cap on the air valve.
  • Turn the power back on to the pump and check to see if the problem has been resolved.
Also Read: 7 Reasons Why Your Water Is Brown

2️⃣ Pressure Tank Has Pressure But No Water 


It can occur due to a clogged water inlet, a faulty check valve, or a malfunctioning pump.


To fix this problem, try the following steps:

  • Check the water inlet for any clogs or debris and clear it if necessary.
  • Next, check the check valve to see if it is working correctly. If it’s not, replace it.
  • Check the pump to see if it is functioning correctly. If not, consider hiring a professional to repair or replace the pump.
Also Read: Why Am I Getting Air In My Water Lines With A Well?

3️⃣ Tank Bladder Failure 

Tank Bladder Failure


The bladder in a pressure tank can fail for several reasons, including age, overuse, or exposure to harsh chemicals. When the bladder fails, it can leak water into the air chamber, reducing the overall pressure in the tank.


To fix a failed bladder, you must replace the entire pressure tank. Here’s how:

  • Turn off the power to the pump.
  • Drain the water from the tank and disconnect the pipes.
  • Remove the old tank and replace it with a new one.
  • Connect the pipes and fill the tank with water.
Also Read: Can Your Well Run Out Of Water?

💡How Much Air Pressure Should Be In A Water Tank FAQs 

What is good water pressure for a well?

Typically, good water pressure for a well is around 20-50 PSI.

However, the best water pressure for a well system depends on many things, like how big your storage tank is, how big your pump is, and how many fixtures you have in your home.

How does a well pressure tank work?

A well-pressure tank works by storing water under pressure and regulating the water pressure in a private well-water system. It uses an air bladder to separate water and air inside the tank and maintain certain air pressure. When water is drawn from the well, the pressure drops, and the pump turns on to refill the tank. The stored water in the tank is then used to supply water to the fixtures in the house, reducing the frequency of pump activation.

When should I add air to my water pressure tank?

You should add air to your water pressure tank when the pressure in the tank drops below the recommended level, typically around 20-30 psi for most residential systems. Adding air to the tank when necessary can help prolong the life of your pump and ensure consistent water pressure in your system.

How to increase water pressure with a pressure tank?

There are several ways to increase water pressure with a pressure tank, such as:

1. Increasing the air pressure in the tank,
2. Changing the pressure switch, or
3. Installing a larger pressure tank.

Using an air compressor or a bike pump with a Schrader valve adapter, you can add air to the tank until it reaches the recommended pressure, usually between 20 and 30 psi. You can also change the cut-on pressure setting on the pressure switch that controls the pump.

What happens if your pressure tank is too high?

If the pressure in the tank gets too high, it can cause the following:

1. Overworked pump
2. Pipes to burst
3. Leaks, and 
4. The less efficient system overall

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