To assemble the brewing cylinder the order is as follows. Place the perforated grate (8) on the inside of the cylinder base (7). On top of the perforated grate, place a nylon filter (9), then place the silicon seal (10) on top of the nylon filter on the inside of the cylinder base. Note - To secure glass cylinder in brew base - wet bottom of cylinder, use hand to push in the seal. Seat cylinder down flat on top of the seal clamp to lock into brew base.