Part of the Fluidmaster PRO range. Fits virtually all top button activated cisterns with a 2" outlet Designed with professionals in mind, this mechanical drop valve is suitable for virtually all top button activated cisterns with a 2" outlet. With adjustable full and partial flush volumes for extra fine tuning. Part of the Fluidmaster PRO range, this mechanical flush valve is suitable for virtually all top activated close couple cisterns. Dual flush for improved water efficiency. The adjustable sliders allow for fine tuning of both full and partial flush volumes. A twist and release function offers easy removal for maintenance and replacement. Rods can be easily trimmed to fit into different height cisterns.