to circulate water in fresh water tank to expansion talk.
No, an expansion tank is not required.
There shouldn't be just water in the expansion tank. If the coolant (50% anti-freeze and water) appears to be boiling in the expansion tank, you may have a bad head gasket or cracked head.
To allow for the expansion of heated thot water
expansion tank
Robert Frost
Yes, an expansion tank can be hooked up to a hot water line. This is commonly done in the case of hot water home heating systems.
Yes
i dont really know sorry
I believe that the larger the hot water tank, the greater is the need for an expansion tank. Water expands as it is heated. This is why all hydronic heating systems require an expansion tank. A water heater would need expansion tank when a backflow preventer or check valve is installed in domestic cold water line directly after water meter. Some areas require backflow prevention, but not all. Have to check with local plumbing authority about that.
Its a thermal expansion tank to absorb the pressure when the cold water heats in a hot water tank.
It will swell and burst