wallhung WC, washdown flushingProduct Details Company Name Jika Brand Name Troma Model Number H821390 Maximum Volume 3.75 litres Category WC Suites Available In Belgium Germany Netherlands Efficiency Rating ChartCompany name:JikaModel:H821390 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.