I have a well water tank. And recently during using my water the pump kicks on and off constantly ubtil we are done using it. We have an Team Amtrol water system tank with epoxy coating inside and out. Max work pressure is 75 psig, Max. work temp is 120 degrees F., Factory setting is 100 psig. Someone told me I need to add air to my tank, How do I do that. I have no air valve. There is a place at top where the air pressure gage is attached, then a middle spot that is capped off for water, then a spot on bottom where the water pipe is ibstalled. If anyone knows how to help please contact me. Thanks