Concealed cistern, 4.5 litres single flush with pneumatic operation and a delayed action bottom supply fill valve Product Details Company Name Ideal Standard International NV Brand Name Conceala Model Number S427067 Maximum Flow Rate 4.5 l/min Maximum Volume 4.5 litres Category Cisterns Available In United Kingdom Efficiency Rating Chart Company name:Ideal Standard International NV Model:S427067 4.5 l/min