Fluidmaster float valves for toilet cisterns and storage tanks. The quite, reliable replacement for faulty, old fashioned mechanisms. Compact, efficient design fits todays 6 litre cisterns New design provides a 40% quieter fill Unique quick realese coupling nut, for easy access & maintenance Ends noisy late night storage tank refils Works well with high or low water pressure Fills faster than previous models Easy to access screen filter ensures years of trouble free operation Redesigned float allows greater water volume for ideal flush Also available with a 3/8" threaded shank Also available with a heavy duty brass shank which eliminates cross threading