The Amtrol Extrol hydronic expansion tanks are for use in closed, non-potable hydronic heating and chilled water systems. Available in diaphragm, full acceptance and partial acceptance bladder designs, all Extrol expansion tanks are made in the USA at our ISO 9001: 2008 registered facilities. ASME tanks meet all Section VIII, Division I standards.

• Replaceable, full acceptance bladder design.
• Heavy duty butyl bladder; industry’s thickest.
• Free-standing on integral welded ring base.