Over the last century, Diamond-U Products has proven to be a steadfast manufacturer and leading source in the pneumatic and automotive industry.

Our company has served this industry by providing innovative techniques as well as long-established knowledge to ensure that every part we manufacture meets our high quality standards.

Diamond-U Products was founded in 1923 by Fred Koester during the awakening of the automotive industry. The company originally provided tire inflators for the Model-T Ford. Over the last 80 years the company has steadily grown to offer a vast selection of pneumatic accessories at competitive prices. Our commitment to excellence and superior quality in our products continues to be our priority today as it did in the beginning. Diamond-U Products takes great pride in its high rate of customer satisfaction with an assortment of products that have made it a trusted source in the pneumatic and automotive industry. Our experienced senior staff members offer friendly service, knowledgeable advice and are available to assist with any questions or special needs.

Over the last decade, the current owner, Dominic Picarelli has continued to maintain the uncompromising high standards set forth by Diamond-U Products’ founder, Fred Koester and his successor, Don Adams, and is committed to do so for generations to come.

Dominic Picarelli,
President Diamond-U Products, Inc.