Geberit Flush Valve Type 290, D50, Dual FlushFeatures For ceramic cisterns For potable water For greywater (rainwater) with pH value 6. 0 9. 5, if a filter system is used Dual flush Height adjustable Small and large flush volume can be set depending on the amount of water in the cistern Overflow pipe height adjustable With lid attachment Suitable for basket, for flush valve type 280 Suitable for basket, for flush valve type 250 (Twico 1) Illustrated Code 282. 352. 21. 1 282. 352. 21. 1: Geberit