Proco Products, Inc. designs and manufactures durable, low-maintenance expansion joints for use specifically in marine industries, such as ballast systems, circulating engine water and main propulsion engines. Marine and aquatic conditions are unique and require equipment that can withstand the turbulence, wear, and corrosion that can occur. Proco Products Inc. provides you with expansion joints that can endure even the most rigorous environments. Proco operates worldwide, and maintains one of the largest product inventories in North America. For more information on expansion joints and check valves from Proco Products, Inc. and to check pricing and availability, contact us today. For an interactive PDF Applications Form, click here.