Grohe Dal Adagio Pneumatic Single Flush Valve Piston & Seal 43544

Quick & easy fix for a cistern forever leaking into the toilet pan. Simple installation, simply pull the old one out, and insert your new cartridge and you're away. You should notice that on 95% of old pistons that the washers have water blisters. This stops the washer from properly seating on the base, therefore causing a leaking cistern.  Note: the old piston that you are taking out may be a very dark green and pink. Do not be alarmed as this is normal and the new white one will be its replacement.