The Vortex cistern is compatible with all Tavistock back to wall pans and furniture units.The Vortex dual flush concealed cistern has a bottom entry inlet and is provided pre-assembled. Featuring a pneumatic dual flush valve 3/6L cistern is ideal for slimline and low height furniture as it is only 135mm deep. The cistern has top and front access and is suitable for 0.2-10.0bar working pressure range.