Close coupled, 6/4 litres dual flush with conventional fill valve Product Details Company Name Ideal Standard International NV Brand Name Concept Space Corner Model Number E1205, E1212 Maximum Flow Rate 4.5 l/min Maximum Volume 6/4 litres Category WC Suites Available In United Kingdom Efficiency Rating Chart Company name:Ideal Standard International NV Model:E1205, E1212 4.5 l/min The average flushing volume for dual flush WC Suites and Cisterns is calculated as (a + (3 × b)) ÷ 4, where a is the full flush value and b is the low flush value.