Welkin Mechanical provides a wide range of infrastructure, process and heavy mechanical piping for the NYC Department of Environmental Protection (DEP) for both water and waste water, Transit Authority, Port Authority and other agencies throughout New York City. Our capabilities include design, fabrication, installation and completion of a large variety of piping systems to keep our great city functioning optimally. With certified welders, steamfitters, plumbers, millwrights, operators and engineers on staff, we can expertly manage any project, large or small.