The air pressure in a water pressure tank should typically be set 2 PSI below the pump's cut-on pressure. This ensures optimal system performance and longevity.
Understanding Tank Pressure Settings
The correct air pressure in your well pressure tank is crucial for the efficient operation of your water well system. It prevents the pump from cycling too frequently, which can reduce its lifespan, and ensures a consistent water flow in your home. The specific pressure depends on your well pump's pressure switch settings.
The provided reference highlights the standard configurations:
- For a 30/50 PSI pressure switch: The well pump cuts on at 30 PSI and off at 50 PSI. In this common setup, the pressure of the tank should be 28 PSI.
- For a 40/60 PSI pressure switch: The well pump cuts on at 40 PSI and off at 60 PSI. For this system, your pressure setting should be 38 PSI.
This principle of setting the tank's air pressure 2 PSI below the pump's cut-on pressure helps maintain a cushion of air, preventing the tank from becoming waterlogged and allowing it to properly store pressurized water.
Air Pressure Reference Table
To easily determine the correct air pressure for your water pressure tank, refer to the table below, based on the common pressure switch settings:
| Pressure Switch Setting | Pump Cut-On Pressure | Recommended Tank Air Pressure |
|---|---|---|
| 30/50 PSI | 30 PSI | 28 PSI |
| 40/60 PSI | 40 PSI | 38 PSI |
Practical Considerations for Setting Tank Pressure
Setting the air pressure in your water pressure tank is a straightforward process, but it requires the pump to be off and the tank to be completely empty of water pressure.
Here are some key steps and tips:
- Turn off Power: Always shut off the power to your well pump at the breaker before checking or adjusting tank pressure.
- Drain the Tank: Open a faucet (preferably one on the lowest floor) to drain all the water from the tank until the flow stops and the tank is completely depressurized.
- Use a Reliable Gauge: Use a tire pressure gauge to check the air valve on top of the tank. This valve looks similar to a car tire's air valve.
- Adjust if Necessary:
- If the pressure is too low, add air using an air compressor until it reaches the recommended PSI.
- If the pressure is too high, release air by pressing the pin in the center of the air valve.
- Close Faucet and Restore Power: Once the pressure is set correctly, close the faucet and restore power to the well pump. The pump will then refill the tank and repressurize the system.
Regularly checking your tank's air pressure, perhaps once a year, can help maintain the efficiency and longevity of your entire water well system.
