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................Some wells have a one way , check valve installed above the pump ! This valve allows the pump to PUSH water , UP the pipe through the check valve and into your pressure tank . When the pressure in the tank reaches the upper limit cutoff pressure of say 60psi , the pressure switch turns OFF the well motor . Now , without the check valve , the pressure tank would literally PUSH the pressurized water BACK down the pipe and your pressure tank would be empty . SO , the pressure tank is pushing against the check valve and when you turn ON the faucet it pushes the water into your home !
..............ALL modern pressure tanks have an air bladder inside of them with a valve stem connected to the outside of the tank such that you can pump air into them just like a car tire . They should be inflated to 2psi BELOW the low side kickIN pressure on the pressure switch............................SO , if the pressure switch turns ON the pump @50 psi , the air bladder should be inflated too 48psi ! The proper procedure to do this is1) Turn OFF the pressure switch , and 2)allow ALL water in the tank to drain OUT , because the air bladder cannot fully inflate inside the tank IF there is any water still residing there !
................When you turn the pressure switch back ON , the pump will fill the tank to the high side pressure and compress the air bladder until the pump shuts OFF . The air bladder is now very compressed and it pushes the water out of the tank and into your home . , fordy
