WALL-HUNG WC Product Details Company Name Hidra Ceramica SRL Brand Name DIAL Model Number DLW10 Maximum Flow Rate 4.5 litres Maximum Volume 4.5 litres Category WC Suites Available In United Kingdom Efficiency Rating Chart Company name:Hidra Ceramica SRL Model:DLW10 4.5 litres 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.