DiscountFilters.com is the flagship site of National Trade Supply, a leading e-commerce company in the home improvement industry. Featuring a vast array of filtration products, National Trade Supply and its affiliate companies, Midwest Purification and National Filter Sales, pride themselves on providing customers with 100% U.S. sourced raw materials and products made right here in Greenwood, Indiana. National Trade Supply is located just minutes south of Indianapolis in a 68,000 sq. ft. office and warehouse that holds more than 250,000 products as well as a growing number of employees. DiscountFilters.com has also had the honor of receiving several growth awards, including the Inc. 500 List of Fastest Growing Companies and Internet Retailer Top 500 Retailer.