About Main Janitorial Welcome to Main Janitorial Supply LLC. We are a customer-driven distributor of sanitary supplies, food service, institutional and industrial supply industries as a retailer. We carry a large inventory of brands and products. Main Janitorial Supply LLC stocks your major manufacturers in our Warehouses and we serve the needs of our customers in a timely manner. We are a woman owned Company. We will ship to all U.S. locations and Global. Thank you for giving us the opportunity to serve you!