Delany’s Empire piston valve comes with a self-cleaning bypass. A solid-brass piston cartridge provides durability and performance at low psi levels. The cartridge’s nickel plating prevents both corrosion and impurity buildup. The main valve seat is below the supply line inlet. The Rubberflex handle assembly is easy to use and assures leak-free operation. With the SlipFit adjustable tailpiece and O-ring design, changing a tailpiece is fast and easy. It is available in all LEED HET-gpf configurations and can be ordered with SmartHandle and dual-flush capability. Delany Products.