The Fluidmaster Delchem bottom inlet part 3 float valve with adjustable 12. 7 mm plastic tail is a dependable toilet float valve replacement for most ceramic or plastic cisterns. It offers low noise for a quiet and efficient fill and is designed for wide ranging pressures. This bottom entry valve features an anti-siphon design which prevents contamination of fresh water supply and provides Delchem durability. It is WRAS approved and has a 1/2" bottom entry shank. The adjustable lever arm ranges from 6" to 9".