The VDL PVC non-return valve is spring-loaded with cone and has rubber seals. The cone has guideways so that the cone is always in the right place; these guideways also prevent the cone from rotating. As a result, this valve is very stable during use. The VDL valve can be installed in any direction and with proper use offers a lasting leak-free connection.
With clean water, e.g. rain water in intake and pressure lines