Concept Space compact close coupled / back to wall WC bowl – horizontal outletProduct Details Company Name Ideal Standard International NV Brand Name Concept Space Model Number E120601 Maximum Volume 3 litres Category WC Suites Available In United Kingdom Efficiency Rating ChartCompany name:Ideal Standard International NVModel:E120601 3 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.