Welkin Mechanical, LLC is a mechanical construction firm specializing in process piping, pumping, filtration, and in-facilities water and waste water projects. Welkin’s principals have served clients ranging from government agencies to utilities, contractors and private firms. Welkin’s projects include the North River Wastewater Treatment Plant; reconstruction of piping systems at various WPCPs; and shaft maintenance and tunnel dewatering projects for the New York City Department of Environmental Protection.