wall hung WC washdown Product Details Company Name Alfoldi Brand Name CUBUS Model Number 6638C1 Maximum Flow Rate 3.8 l/min Category WC Suites Product Description wall hung WC washdown Available In Hungary Efficiency Rating Chart Company name:Alfoldi Model:6638C1 3.8 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.