The FluidMaster Pro 45B Bottom Entry Adjustable Valve delivers professional-grade cistern performance with ultra-quiet operation and robust brass construction. Engineered for reliable water flow control, this adjustable fill valve features height adjustment from 230mm to 355mm. The heavy-duty 1/2" brass shank provides superior durability, resisting cracking, corrosion and thread stripping in demanding plumbing applications. The anti-siphon design prevents water supply contamination, meeting professional installation standards. Fast refill technology ensures absolute shut-off after every flush, while the pressure-optimised mechanism extends operational life. Accessible seals simplify maintenance, allowing straightforward replacement without specialist tools or extensive downtime. Features & Benefits: Ultra-quiet operation for residential and commercial cistern applications. Heavy-duty 1/2" brass shank construction resists cracking, corrosion and thread stripping. Anti-siphon design prevents contamination of water supply. Fast refill with absolute shut-off after every flush for water efficiency. Pressure-optimised mechanism works with water pressure for extended durability. Accessible seals enable simple maintenance and replacement. Quick and easy installation preferred by professional plumbers. Height adjustable from 230mm to 355mm (9"-14"). Colour: Black/Red/Brass.