We have two kinds of tanks for pumps, steel and stainless steel. The main size is 24L and 50L. The inner membrane is EPDM.
A pump tank is used by a well system to store water until it is needed in the home. The tank is also called a water pressure tank, because it is where the water is pressurized to give it some force to get it through the pipes. The pressure tank pulls in water from the well and pushes it through to the water heater. The tank can have some problems on occasion, and there are a few things home owners can look at to discover what the issue might be before calling in a service technician.