The Siamp Optima 49 Flush Valve is a high-performance, dual flush valve designed for efficient water usage and reliable operation. Suitable for a wide range of toilet cisterns, it offers a simple yet effective solution for controlling water flow, with a durable build that ensures long-lasting performance. Ideal for both new installations and retrofitting, this flush valve provides an eco-friendly way to reduce water consumption while maintaining powerful flushing action. Suitable for plastic or ceramic cisterns, this Siamp Optima 49 Dual Flush is a great choice for your next bathroom renovation. With an adjustable height, it helps to save water and offers dual flush for convenience. Features & Benefits: Can be installed into plastic or ceramic cisterns, Push button: dual flush, Actuation effort below 20N, For lid holes ranging from 16 to 50mm, with or without collar depending on the diameter, Button off-center +/- 15mm, Stirrup: adjustable in increments of 12 mm, Overflow can be cut in increments of 4mm, Adjustable small flush, from 2l to 4.5l, Adjustable deadwater level, High flush rate of 3.5l/s, Foam pan seal supplied for compensating pan irregularity.