My Main Supply is your premier source for plumbing, hardware, paint, lumber, electrical and janitorial supplies. They are multi-generation family-owned business serving customers from New York and all over the US for over forty years. With more than 50,000 items in stock, My Main Supply has a wide range of items in their state-of-the-art warehouse. Their product categories include janitorial supplies and maintenance equipment, plumbing, electrical, paint, hardware, lighting, window and door parts, tools, go-green products, and houseware items to name a few. My Main Supply is located in the heart of Long Island, in Westbury, New York 11590.