[jnaas2]

There is tank hooked up to your water line where it enters the house with the pressure gauge that you mentioned on it. This tank is basically a big expansion tank full of air that keeps the pump from cycling on and off rapidly. Inside the newer tanks is a rubber bladder that keeps the air in the tank, if it was fixed a year ago and is acting up again it sounds like the bladder is bad. To fill the tank with air turn off the water pump and there will be a valve on the side that looks like a tire valve for airing up your tire, the tank is probably full of water so open a sink valve and fill with water 2 minutes or until you get air out of your faucet. Turn the faucet off and pressurize the tank to 5 psi under the cut-in pressure of your water pump (if the water pump normally starts at 40 psi fill tank to 35 psi )then turn water pump back on. The tank needs to be replaced or keep a eye on it, if you let it continue to short cycle it will cause your water pump to fail