training, boilers, boiler maintenance or repair, building design, chillers, computer aided design (cad) services, heating system design, industrial automation, piping systems, plumbing systems, plumbing system design, pump maintenance or repair, pumping systems, sheet metalwork design, water treatment services available from g. j. hopkins, inc. based in roanoke, va. click the links below to visit our website or contact us via our profile page.