SharkBite Brass 1/2 Inch Compression x 3/8 Inch OD Compression Quarter Turn Straight Full Port Brass Ball Valve. SharkBite quarter-turn ball valves with compression connections are a safe way to provide water to ice machines, toilets and faucets. Connect the valve to the pipe with the compression nut and ferrule, tightening with a wrench. Then connect the supply line to the valve. Quarter-turn shutoff provides easy, maintenance-free shutoff for your accessories. Compatible with copper tubes.