The model 111.798.00.1 in-wall tank and carrier system for wall-hung toilets from Geberit replaces the previous 2x4 version and offers several installer-friendly improvements. The new model, featuring a full range of actuator plates and remote controls, provides a flexible choice for buildings with high floor constructions. Geberit re-engineered the Sigma concealed tank for this new system to fit within a standard frame. The 2x4 system now fits the same dimensions as the 2x6 system, making it easy for the installer to prep the walls for either system during the rough-in stage. The tank also provides more space for removal of the fill and flush valves. 847/803-7777; www.us.geberit.com.