Plumber’s excavating is not included in the general contract. If there is any superfluous earth in connection with his work, he, and not the general contractor, should remove it. Contracting methods are explained in another section of the book.
WATER DISTRIBUTION.
Lead should be used for all purposes where pipes are exposed to view and where they come in contact with the earth. This is common practice. Sometimes, however, brass or planished copper pipes and fittings are used where they are exposed to view. Brass makes very beautiful and satisfactory work. Iron pipe, galvanized inside and out, is occasionally used for exposed work. It does not look as well, however, as lead pipe. Galvanized iron pipe is also frequently used where not exposed to view, and where it does not come in contact with the earth. Objections will be made to this by plumbers who are used to doing lead work. In all hospitals where the best work is done iron or brass pipe is used, and lead pipe and connections are entirely dispensed with. However, the use of lead pipe where exposed to view and where in contact with the earth, and iron pipe galvanized for other places, makes most excellent and beautiful work for dwelling-houses. The connections between iron and lead pipe should be of brass.
The water works of many cities and towns are from direct-pressure mains. It is common for such pressure to be forty pounds to the square inch under ordinary conditions. A fire pressure is much greater. Therefore, all direct-pressure pipes of lead should be extra strong. Tank-pressure pipes, those which connect with a tank in the attic or above a water-closet, may be medium strong. The terms “extra strong” and “medium strong,” as here used, are definite in their meaning, and apply to regular grades of pipe. The interior fixtures of an ordinary dwelling-house are supplied with lead pipe five-eighths of an inch in diameter, or iron pipe three-quarters of an inch in diameter. In the above will be found all that applies in general terms to an ordinary specification for water distribution. Special mention will be made later.
Stop-cocks should be provided sufficient entirely to disconnect and drain all pipes, fixtures, and connections. “Stop-and-waste” cocks should be provided at the bottom of all main risers where they cannot otherwise be drained. A “stop-and-waste” cock is one which shuts off the supply from its source, and drains the water from pipes above, so that it passes out to a receptacle provided for that purpose. In some instances it is allowed to run to a sink on the cellar floor, or it may be taken in a bucket.
The city water-supply for an ordinary dwelling-house is generally through five-eighths-inch extra strong lead pipe, and is provided with a stop-box so that the water can be turned off from the house at the street.
OUTSIDE FIXTURES.
Outside fixtures which connect with the city water are a street-washer and a hydrant. The street-washer is usually placed in front, so that a hose may be attached to it for sprinkling purposes. There are many standard grades of street-washers carried in stock by all plumbers. The hydrant has about the same lower connections as the street-washer. The hose connection and opening stand well above the lot grade. It is usually placed in the back yard or stable. The outlet may have a hose coupling, and thus be used for sprinkling purposes in the back part of the lot or otherwise, as desired. Where there are no hydrants, it is common to run an iron pipe along the ground to connect the front and back yard. Thus it is not necessary to have so large a supply of hose. The pipe thus used is three-quarters of an inch in diameter. It is less expensive than rubber hose, and does not deteriorate. It should have a short hose connection in front, and hose coupling at the back.
SOFT-WATER SUPPLY.
In many cities the water from the public pipes contains too much lime to be used for bathing or washing. In such a case it is necessary to supply cistern water for that purpose. This is done by connecting the cistern in the yard with a tank in the attic, or some place above the highest fixture. To do this a force pump is placed in the kitchen. The best kind to use are those known as double-acting, horizontal, brass-cylinder force pumps. They may be screwed to the floor, and the handle come up next to the sink or between the drain-board and the dry-board. When not in use, this handle can be next to the wall and out of the way. A motor may be used in lieu of a pump. It is placed over the kitchen sink, and has connection with city water works. When it is desired to pump water to the attic, one can turn on the city water at the cock and let it run. Thus the city pressure is exerted through the motor to pump water to the attic, and the labor of pumping entirely done away with. The cost is about fifteen dollars more than a good pump. The suction of such a pump or motor should be one-and-one-half-inch strong lead pipe, and the supply to tank in attic one-and-one-quarter-inch lead or iron pipe where not exposed to view. Where the pump or motor is placed as indicated, it may be used to pump water directly to the kitchen sink, and it is generally best that such an arrangement be made. Of course, water may be drawn from the tank in the attic to this sink, if it is desired to so arrange it; but where this is done, it is necessary to pump all of the cold water used in the kitchen to the attic. This is unnecessary. The sink may have a direct pump connection by means of a five-eighths-inch strong lead pipe which connects with the tank supply. On the end of this lead pipe may be a brass or nickel compression cock over the sink. When it is desired to pump water into the tank this cock is closed, and the only connection is with the tank above.