Our Locations ABOUT PORTER WARNER INDUSTRIES Porter Warner Industries (PWI) is a distributor of foundry supplies since 1946. PWI sells foundry consumables that range from alloys to zircon. We represent the finest manufacturers in both the foundry and finishing industries. PWI has 12 warehouse locations positioned throughout the United States from South Carolina to California to provide you with just in time service. PWI is committed to meeting customer requirements, increasing customer satisfaction, and providing a safe working environment for its employees. OUR HISTORY 123 Building Relationships For Over 70 Years We are deeply rooted in the fabric of the American Foundry and Manufacturing industries. Learn more about our company and history. ABOUT US