Description Fill Valve Replacement Adjustable 7-14 inches Screened Filter for Keeping out Mineral Deposits Tower Style Fill Valve Commonly fits American Standard, Kohler and Toto toilets Filter makes this Fill Valve easy to service when dealing with Hard water which over time can degrade you fill Valve. NuFlush Adjustable Water Height Fill Valve. Fill Valves are designed to fill the toilet tank with water from the water supply line after it has been emptied by a flush. This fill valve is a universal fit for 1 and 2 piece toilets that are bottom water fed with a 7/8″ pipe connection. The fill valve replaces the ballcock mechanism and is more efficient and easy to install.