The Fluidmaster Pro Series compact side entry fill valve with brass shank has a brass shank and a durable composition to ensure a strong performance. The Fluidmaster is primarily designed for use with toilet cisterns and storage tanks. The Fluidmaster® PRO Series was developed for the hard working plumbing professional who requires high quality, professional grade products that have been engineered for reliability and durability. The brand represents the most trusted professional toilet. Preferred by professional plumbers 1/2in Heavy Duty Brass UK shank For use in a toilet cistern or storage tank Ultra Quiet Minimal water hammer Long life performance Fast refill Unique snap release for easy access and maintenance Anti-siphon design prevents contamination of water supply