1-1/8 Barbed In-Line Check Valve with O-Rings for Auto Ballast SystemControl 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 Individual WARNING: This product can expose you to chemicals including Diisononyl Phthalate (DINP) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.