What is the minimum required water level for pressure tanks?

The minimum required water level for pressure tanks is typically defined to ensure that the tank can function effectively under varying conditions and demands. When a pressure tank is at least two-thirds full with water, it helps maintain adequate pressure and provides a reliable supply of water for systems that require pressurized water, such as firefighting systems or irrigation systems.

Achieving a pressure level of at least 75 psi is critical because it is often the minimum pressure threshold needed to deliver water effectively through the system, ensuring that it can overcome friction losses and reach the necessary outlets or firefighting equipment. Adequate pressure also ensures that the tank can respond appropriately during operational draws, reducing the risk of pump cycling and potential damage.

Maintaining the water level at two-thirds full ensures a buffer of capacity that can absorb peaks in demand without collapsing on pressure, which is essential for the reliability and efficiency of pressure tank systems.