How do you open a stuck foot valve?

To open a stuck foot valve, first, ensure that the pump is turned off and the system is depressurized for safety. You can try to dislodge the valve gently by tapping it with a rubber mallet or using a wrench to apply light torque. If that doesn’t work, consider removing the valve and cleaning it thoroughly to remove any debris or corrosion. Reinstall the valve and check for proper function before resuming operation.