Apparatus in the form of a shower head to aerate water is disclosed. An uninterrupted and uniform spray pattern is achieved by utilizing a terminating wall for the coaxial aperture of the nozzle and an end wall for the nozzle downstream of the terminating wall. The terminating wall is separated from the end wall by an annular moat and is radially inboard and upstream from the end wall so that it is physically protected against damage, especially at the annular intersection between the coaxial aperture and the end wall. This annular intersection is made a very sharp angle, chamfered no more than 0.003 inch, to achieve this uniform spray pattern, yet the end wall downstream thereof protects it against physical damage to maintain this uniform spray pattern and to protect the user of the shower head against injury from cuts.