I have seen several applications where the building was constructed over a huge pressure tank or two. We just disconnected the big tank, installed a CSV (Cycle Stop Valve) and a little bladder pressure tank at the end of the huge tank(s). Now there is plenty of space to put in a bedroom or at least a tool shed. But somebody is going to need to torch that old tank into small enough pieces to get it out the door first.
We even have small cities where the water tower has been replaced with a CSV and a little 80 gallon size tank. But removing the old water tower, especially because it is covered in old leaded paint, would cost so much they just leave the water tower standing as a place for some kid to spray paint a defense to his sister’s honor.
Here is a graphic to show the CSV system compared to the old pressure tank system. Notice that the pump with the CSV runs continuously no matter what or how much water is turned on while the old style system cycles on and off repeatedly. Cycling on/off is the biggest killer of pumps/motors.
http://www.cyclestopvalves.com/simple/home.php
