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 Individual Warning [https://productimageserver.com/prop65/6pt.png]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 [http://P65Warnings.ca.gov].