Description The Dranjer CBR9 is a catch basin drain cover. Versatile Fit & Installation Fits drains from 5 3/4 to 9 inches. Replace the strainer plate of your existing catch basin drain. Combines protection from infiltration of radon gas with high water flow How Your Dranjer J Series Works J Series have a ball valve that floats, allowing for high flows through the unit. When the flow stops the valve closes and radon gas can no longer flow up through the floor drain or sump cover. Effectively reducing radon levels in the dwelling. Dranjer products are engineered and laboratory and field tested. Dranjers are often installed association with an ASD system but may be the only action you need to reduce your radon levels.
