CW operation on five additional lines between 47 &mgr;m and 79 &mgr;m has been observed in the water vapor laser. Competitive and cascade coupling have been shown to exist between the nine presently known CW lines. These interconnections are the first reported for the water vapor laser, and may assist in the identification of the unknown lase`r species and energy levels. Lamb dips have been observed on three additional lines, and pressure‐broadened linewidths have been derived from measurements of the dips.