I have a question regarding the placement of the a hot water expansion tank. How critical is it for the tank to be in the cold side of the system? My hot water installation has the tank in the HOT side of the system. My install is in a real confined area so im sure thats why they installed it that way. If it has to be in the cold side, can it be installed anywhere in the COLD side, such as after the main shutoff for the whole house?
Thanks in advance for the help.