The INSCO Group is comprised of several industrial service companies that distribute technical products, engineered systems and specialized services for the clarification, transfer, control and sealing of fluids. Its companies include Niantic Seal, providing sealing products; D.L. Thurrott, for pumps; The Chisholm Corp., which provides filtration products; Prosco Products, that offers filtration products; and D.L. Thurrott Air, for air products. The INSCO Group is ISO 9001:2000 certified.