General Plumbing near Hickory Avenue in Newport, RI

Turn off power of the system
Drain system completely
Disconnect current pressure tank
Cut out copper piping as needed to be able to remove the tank
Disconnect pressure switch from system
Purchase and install new 20 gallon pressure tank
Purchase install new pressure switch
Install a pressure relief valve per code
Reconnect water piping, potentially add unions to make disconnection easier in the future
Fill the system ensure proper operation

Warranty
2 years parts and labor