Closed coupled back-to-wall WC white (without cistern, without seat & cover)Product Details Company Name Ideal Standard International NV Brand Name Connect Model Number E782101 Maximum Volume 3.75 litres Category WC Suites Available In United Kingdom Efficiency Rating ChartCompany name:Ideal Standard International NVModel:E782101 3.75 litres www.uwla.eu 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.