Most of the higher grades of bath tubs are now made of porcelain or enameled cast iron, with a wide roll rim.
The less expensive styles of bath tubs are made of an inferior quality of enameled cast iron; of steel body with copper lining, known as "steel-clad" tubs, and of steel body, enamel painted.
Of the cheaper grades, the steel-clad bath tub gives good service, but the enamel-painted tub, although making a good appearance when new, in many instances soon takes on a very shabby appearance, owing to the wearing off or cracking off of the enamel paint.
The bath-tub waste should be 1 1/2 inches in size, and its trap vent also 1 1/2 inch.
Plate III. Baths
Plate 3. Connections for
Fig A. Connections for Foot Bath Sitz Bath.
The regular sizes of bath tubs are, viz.: 4 ft., 4 ft. 6 in., 5 ft., 5 ft. 6 in., and 6 ft. The 5 ft. and 5 ft. 6 in. sizes are generally the preferable sizes. The two smallest sizes are too short for the comfort of the bather, and should be used only when space will not allow the use of a larger size. The old-style sheathed-in tub is no longer installed on new work. This form of bath tub presented much opportunity for the collection of filth around its upper edges, and was not nearly so cleanly a fixture as the modern bath tubs, which are easily kept clean, especially in the case of the porcelain and enamel-lined bath tubs.
It is often required, in the use of enamel-painted baths, to put on a new coat of enamel. When this is to be done, the surface of the tub should first be made as clean and smooth as possible, following which a sufficient number of coats of white lead should be applied to prevent the dark color of the tub from showing through, after which the enamel may be applied. In connection with the bath tub, the use of traps of the drum pattern is good practice. A better grade on the outlet of this trap may often be secured than from the S-trap, and the cleanout of the former is much more accessible. When the S-trap is used under the floor, as in the case of the bath tub, an excellent method of providing a cleanout is the one shown in Fig. B, Plate 3.
This makes the cleanout accessible without the removal of flooring, a thing which is necessary ofttimes in order to operate the clean-out at the bottom of the S-trap.
Whenever the latter is used the floor above it should be screwed down, so that it may be taken up as easily as possible in the event of repairs to the trap.