The Siamp Optima 50 Dual Flush Cistern Valve is a versatile and water-saving solution for your toilet cistern. It features a cable-operated push button for convenient flushing and can be installed in both plastic and ceramic cisterns. The valve offers dual flush functionality, allowing for adjustable small flushes from 2L to 4.5L, and has an adjustable height and overflow for a customized fit. It includes a 470mm cable and a 2" outlet, with a 1 1/2" outlet option also provided. The pack also includes an additional bayonet strainer, nut, seal, cistern coupling bolts, and a foam doughnut washer to compensate for pan irregularities. This WRAS approved flush valve is easy to fit, even without removing the cistern, and is suitable for lid holes ranging from 16 to 50mm. It is backed by a 10-year manufacturer's guarantee.