Rheem is celebrating the 15th anniversary of its PROSTOCK program for Rheem and Ruud distributors. The program was introduced in 2001 by the Rheem Replacement Parts Division as a way for distributors to grow their business and enhance their showrooms. The program allows HVAC and water-heating professionals to browse and buy OEM replacement parts, aftermarket parts and supplies. The anniversary was held at the Benoist Brothers Supply Co. PROSTOCK store in Evansville, Ind., in September. The store was the first PROSTOCK outlet to open.