Zilmet is one of the oldest and largest expansion tank manufacturers in the world. Established in Italy on 1962, Zilmet is an international manufacturer of quality expansion vessels, pressure tanks and plate heat exchangers with several branches across the globe with worldwide distribution. Zilmet is an ISO 9001 certified company that produces in excess of over 7 million tanks and 1 million heat exchangers every year. We take great pride in our globally renowned quality and service and look forward to sharing our story and products with you and your customers. With our North American Headquarters in North Kingstown, Rhode Island, Zilmet is proudly introducing new products for the hydronic, water system and solar industry into North America.