(C-4) Boiler, hot-water heating, hot water supply, and steam fitting contractor

To install and repair fire-tube and water-tube power boilers, packaged boiler systems, hot-water heating and hot water supply boilers, and thermal fluid systems; including all fitting and piping, valves, gauges, pumps, radiators, convectors, fuel oil tanks, fuel oil lines, hazardous waste storage tanks, chimneys, flues, heat insulation, and all other devices, apparatus, and equipment appurtenant thereto, including the insulation of pipes in connection with the boiler installation or repair, and installation of hydromatic radiant heating systems (warm floor) provided these are connected to a boiler;