Grohe Old Style Eau2 Pneumatic Dual Flush Toilet Flush Valve 42774000
With the Grohe Eau2 old style flush valve's design you need not worry about removing the entire cistern to service the valve in future, just simply twist the valve anti-clockwise and the whole top mechanism just lifts right out.
All that is needed then is to simply screw the new valve into place, set the float to your desired height, connect any other mechanisms that you need to and you're ready to go.
Please note: The valve does not include a replacement socket for the bottom of the cistern, you'll need to use the socket from the old flush valve.
Flush Type: Dual Flush