Close Coupled, 6/4 litres dual flush with conventional fill valve and lever. Product Details Company Name Armitage Shanks Brand Name Sandringham Model Number E2910, S3664 Maximum Flow Rate 4.5 litres Maximum Volume 6/4 litres Category WC Suites Available In United Kingdom Efficiency Rating Chart Company name:Armitage Shanks Model:E2910, S3664 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.