Fowler Twico 1 Dual Flush Valve Complete with Button Etc. Product Code ATS068This is the entire Fowler Geberit Twico 1 valve with all ancilliaries including buttons, bridge and push rods. The Twico valves unclip straight off the basket and are a direct replacement without removing the cistern. This valve is also found in Newport low profile short body suites. The bottom thread is 60mm diameter. CLICK TO WATCH A VIDEO OF HOW TO FIT AND ADJUST THIS VALVE Remember, when replacing the flush valve, it is a good idea to also replace