CX-270125: Materials and Fuels Complex (MFC)-782 Potable Water Check Valve Replacement

The proposed action would upgrade equipment cooling lines and install backflow prevention devices in the Materials and Fuels Complex (MFC) Machine Shop, building MFC-782, in order to meet standard requirements and allow the use of potable water for machine cooling. The proposed action would replace the 1-inch check valve in the weld bay with a ¾-inch reduced pressure (RP) watts backflow preventer. The potable water line would be capped where the 1-inch check valve is removed. All of the equipment cooling lines would be re-plumbed from upstream of the 1-inch check valve to the downstream side of the RP watts backflow preventer. Three hose bibs with vacuum breaks would be installed at various points in the machine shop to obtain potable water for equipment use. An abandoned 1 ¼-inch drain line would be removed, and the wastewater opening for the abandoned line would be capped. All water lines downstream of the new (RP) watts backflow preventer would be labeled “Industrial Water,” and all water lines upstream from the removed 1-inch check valve would be labeled “Potable Water.”