The kitchen sink is made of plain, galvanized or enameled cast iron, slate, soapstone, and porcelain. The waste for the kitchen sink is generally 1 1/2 inch, though the tendency is toward the use of 2-inch pipe. As this fixture is usually subject to greater use than any other plumbing fixture of the house, and as much greasy matter enters it, even with the utmost care, 2-inch pipe is often preferable to 1 1/2 inch.

Plate I. The Kitchen Sink - Laundry Tubs

Plate /. Connectins for Kitchen Sink.

Connections for Laundry Tubs

Connections for Laundry Tubs.

The Kitchen Sink 4

The vent for the trap of the kitchen sink should be of 1 1/2-inch pipe. In connection with this fixture, especially in large residences, restaurants, boarding houses, or wherever a large amount of dishwashing and cooking is done, a grease trap will often serve the fixture much more satisfactorily than the ordinary trap. An illustration and description of such a trap will be found under Plate 7. Sinks are generally set about 32 inches from the floor, this measurement being to the top of the sink. This height may be varied an inch either way, to suit the desires of the owner. As the kitchen sink is so much in use, and demands so much hot water, the preference in the matter of such supply should be given this fixture over all others. A quick supply of hot water may be secured by connecting the flow pipe from the range into the hot-water pipe at the top of the boiler instead of into the side of the boiler as generally done. This is of special value when hot water is required at the kitchen sink in the morning, the range fire having been allowed to go out the night before.

Table Of Sizes Of Cast-Iron Sinks

The following sizes are for plain, galvanized, and enameled cast-iron sinks, the depth of sink being 6 inches, and the dimensions in inches.

12 X 12

12 X 20

14 X 22

16 X 16

12 X 14

14 X 14

14 X 24

l6 X 20

12 X l6

14 X 18

14 X 26

16 X 24

12 X l8

14 X 20

15 X 27

16 X 28

16 X 30

18 X 36

20 X 40

22 X 62

16 X 36

18 X 42

20 X 42

22 X 76

17 X 28

20 X 20 •

20 X 48

23 X 42

17 x 30

20 X 24

20X60

23 X 48

17 x 35

20 X 26

20 X 72

24 X 48

18 X 18

20 X 28

21 X 42

24 x 50

18 X 24

20 X 30

22 X 36

24 X 80

18 X 28

20 X 32

22 X 40

24 X 120

18 X 30

20 x 36

22 X 42

26 X 52

18 x 32

20 x 38

22 X 48

The most satisfactory sizes of kitchen sinks for family use are, viz.: 18 X 36, 20 X 36, and 20 X 42. If space allows, 20 X 42 is the preferable size. Sinks 18 X 36 are largely used in the cheaper class of work.

All sinks are cast with the bottom pitching toward the outlet end. Therefore there is no necessity of setting the sink so that its top is other than level.

A valuable device for use in connection with the kitchen sink is the flexible wooden sink mat. This mat, being flexible, will fit into any sink, and in the case of enameled or porcelain sinks keeps the surface from being scratched by pots and kettles. It also prevents breakage in setting dishes, etc., into the bottom of the sink.