The use of foot, sitz, and child's baths is not found to any extent except in bath rooms of the best residences. They do not represent a necessity as does the common bath tub, but are luxuries which add much to the comfort of the bath room.

The waste for each of these three baths should be 1 1/2 inch in size, and the trap vent also 1 1/2 inch. In general, the principles that apply to the ordinary bath tub apply also to the foot, sitz, and child's baths.