School rimless 300 WC HO Close Coupled (Water saving when used with AV2611 Cistern) Product Details Company Name Twyford Bathrooms Brand Name Sola School Rimless Model Number SA1512WH Maximum Flow Rate 4.5 l/min Maximum Volume 6/4 litres Category WC Suites Available In United Kingdom Efficiency Rating Chart Company name:Twyford Bathrooms Model:SA1512WH 4.5 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.