Established in 1927, William M. Collins Company, Inc. has positioned itself as one of the leading mechanical contractors in process piping for Massachusetts and Rhode Island. Our commitment to quality workmanship and performance is unequaled. Specializing in water filtration, wastewater treatment, process piping and specialty piping, we have continued to broaden our base and now include underground gas utility piping and district heating piping. We are heavily involved with the Massachusetts Highway Department “Big Dig” and are contracted to install viaduct and bridge drainage and standpipe systems, associated steam water pump stations and underground gas and steam utility piping.