air in well water system

I just installed a new well pump(10gpm), pressure tank,regulator ,check valve in my house the tank has 38 lbs of pressure it seems that the pump turns on at 40 and shuts off at 55 ,I am getting air in the lines big time all over house shower upstairs and kitchen faucet how do you get rid of the air.

How long has it been in? Does your pressure switch have a low pressure cut off? Did you replace the drop pipe? How deep is the well?