Sales Service Plus, Inc. (SSP) is one of the oldest manufacturer’s representative firms in Michigan. Formed in 1990 through the merger of Sales Service and Sales Plus, SSP traces its roots back to 1932. SSP has become a leading plumbing and heating manufacturers' representative agency through innovation and progressive selling strategies. SSP operates out of a 30,000 square foot warehouse facility in Plymouth, Michigan. We currently employ five warehouse employees, three inside salespeople and five outside salesmen. The outside sales team at Sales Service Plus, Inc. has over 150 years experience combined. We also have a SSP delivery truck that delivers products all over the state, from Detroit to Grand Rapids.