Fluidmaster 550-series dual flush valves set the standard for replacement button flush valves. Water saving dual flush feature with adjustable full and partial flush water volumes. Simple height adjustable overflow. 350mm cable design allows for universal placement of the flush button which can be mounted on front of cistern, top or side. 550-valves can be used to replace syphon valves, the button simply fits into the hole where the syphon lever is placed. Fully WRAS approved tested to 200,000 flushes. Trusted by the professionals