An inlet assembly (T) and a washing device (C), particularly a dishwasher, are provided. The inlet assembly (T) comprises at least one body (1) having a first opening (1a); a connection area (1b) on the body (1), and a hole; a cover assembly (2), at least a part of which is inserted into the body (1) through the first opening (1a), and including a cover body (2a) closing the first opening (1a), a water inlet section (2b) extending from one side of the cover body (2a), a second opening (2d) on the water inlet section (2b), allowing air to enter the water inlet section (2b), a condensation section (2e), formed as a chamber, extending into the body (1), and located on the other part of the cover body (2a), and a third opening (2f) on a part of the cover body (2a) where the condensation section (2e) is situated.