How do you repressurize bladder water tanks?

To repressurize bladder water tanks, first, ensure the tank is empty and disconnected from any water source. Use an air compressor or a manual pump to add air to the tank through the air valve, typically located at the top of the tank. Check the manufacturer's specifications for the correct pressure level, usually between 40-60 psi, and adjust accordingly. Finally, reconnect the water supply and check for any leaks before using the system.