FATSAC 1-1/8" Barbed In-Line Check Valve w/O-Rings f/Auto Ballast System [W755]1 1 8" Barbed In Line Check Valve with O Rings for Auto Ballast System Control the flow of water in an integrated wakeboard ballast system with this 1 1 8" in line check valve. Designed for use in automated ballast systems, this 1 1 8" check valve features barbed ends for easy installation into 1 1 8" wakeboard ballast hose. Flow through design reduces restriction so you can spend more time wakeboarding, and less time filling ballast bags. *Sold as an