The Apex cistern is compatible with all Tavistock back to wall pans and furniture units.The Apex dual flush concealed cistern has a side 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. You can opt to upgrade the flush button on your Apex cistern to a square dual flush button or alternatively an Ellipse push plate. Both buttons have a chrome finish and feature pneumatic dual flush.