Plimpton & Hills Corp. is a business-to-business company specializing in the sale of heating, air-conditioning, plumbing and ventilation products. The company has a long history, founded in 1902 as a plumbing supply company by William Plimpton and Raymond Hills. The Manchester location opened in 2000 and serves as Plimpton and Hills' eighth branch, also housing a Ruud Prostock store.