Campbell Back To Wall Toilet | Finish: Snow White | With Campbell Plus Slim Soft Close Seat Cover | S Trap 100 mm (4") | Size: (L)550 x (W)350 x (D)415mm (22" x 14" x 16")

This is an S-trap model with 100 mm rough-in: the centre of your floor drain must be 100 mm from the finished wall (after tiling). If your drain is at a different distance, choose the trap size that matches or ask your plumber before ordering.