GROHE WC - Flush Valve 37153 wall installation DN20 m. Pre-shut-off without cover plate GROHE Flush Valve for WC wall WC DN 20 Pre-shut-off 6 - 9 l adjustable from 2000 , 2 - 5, 1930 bar flow pressure can be used with flushing flow regulation fitting group I DVGW Reg.Nr. NW-6521AV2337 wall installation box with flushing elbow, height-adjustable pipe without cover plate / actuation