AutoPilot's patented bypass manifold is a pre-assembled unit designed to control the flow rate delivered to our cell. The spring check valve in the manifold allows excess flow, over 20 gpm, to by-pass the cell. The water in turn flows at a controlled rate through the cell where it is super chlorinated. The in-line strainer on the inlet side of the manifold protects the tri-sensor and production cell from debris that might bypass the filter. The location of the strainer next to a connection union makes periodic cleaning easy. The design of our patented bypass manifold guarantees optimum chlorine production and simplifies the installation process of the AutoPilot® Purifying System.