Groco SSCV-1500 1-12 Engine Flush Service Adapter with Isolating Valve The Groco 1-12 Engine Flush Service Adapter adds safety and flexibility to any water system. A simple quarter turn allows for instant emergency bilge pumping or makes for easy winterization and cooling system flushing. The SSCV is an upgraded version of the SSC, featuring a Full Flow In-Line IBV series ball valve. This allows you to isolate the plumbing before SSC and prevents back-flushing into the strainer the seacock. Spec