Glad you asked...
To install a water pressure tank for your home you'll need to remove the old water (if there) and route the water directly from the street supply to the tank before it goes to your home. Installation steps http://www.hammerzone.com/archives/plumb...
Then again, this answer might help you...
Many people install a water pressure tank into their water system between their holding tank and their home. The pressure tank will increase water pressure for the home.

