ABOUT ELMCO + ASSOC. Elmco + Assoc.is the leading manufacturers’ representative expert for the commercial plumbing and mechanical industry. We represent a group of elite manufacturing companies that offer infinite plumbing possibilities to serve many businesses including healthcare, institutional, hospitality, and other commercial environments. Elmco has an innovative structure to lead, educate and service the plumbing/mechanical market that is built on a strong foundation of over 60 years’ experience. Elmco brings revolutionary products from manufacturers to contractors and engineers.