The overflow is shown in detail in Fig. 89. The part _A_ appears inside the tub. It is made water-tight around the edge _C_ by a rubber washer that is clamped tight to the surfaces by the nut _B_. In case of leakage, the overflow may be removed for repair by unscrewing the union attached to the piece _D_ and removing the nut _B_. [Illustration: FIG. 89. FIG. 89_a_. FIG. 89.--Overflow attachment for bath tubs, lavatories, etc. FIG. 89_a_.--Drain attachment for bath tubs, lavatories, etc., showing locknut and union connection.] The drain-pipe connection is shown in Fig. 89_a_. The plug _D_ and the flange _A_ show inside the tub. The flange is made water-tight by a rubber washer that the nut _B_ clamps tight to the tub. The part _C_ is a union which permits the tub to be detached from the drain pipe. Repairs to this joint may be made as in the overflow. [Illustration: FIG. 90.--Old style marble finished lavatory.] [Illustration: FIG. 91.--Types of lavatory plumbing not now used in good practice.] =Wash Stands and Lavatories.=--Wash stands for bathrooms are obtainable in many forms, either plain or ornate, to suit every condition and style of architectural finish. [Illustration: FIG. 92.--Enameled iron wall wash basin.] [Illustration: FIG. 93.--Enameled iron pedestal wash basin.] They are made in marble, porcelain and enameled iron, the last being the most commonly used. They are made to suit the part of the room to be occupied, whether that is against a wall, a corner, or to stand on a pedestal on the floor. Those intended to fasten to the wall may be supported by brackets or suspended at the back from pieces secured in the wall. In Figs. 90 and 91 are shown samples of marble-finished wash basins. In former years basins of this type were very much in use, and until the introduction of the modern porcelain and enameled ware, it was the highest type of sanitary plumbing. The water cocks and traps are of the same style and grade as appear on the most modern examples of enameled ware of Figs. 92, 93 and 94. The water cocks used in Fig. 90 are of the compression type. All of the others are of the Fuller type. The basin in Fig. 93 is provided with extra shut-off cocks on the water pipe under the basin. They are added to the plumbing merely as a convenient means of shutting off the water for repair. The wash stand is usually provided with hot and cold water cocks, a waste pipe with its traps and overflow connections. [Illustration: FIG. 94.--Corner wash basin.]