All waste and soil pipe connections to the main lines are 2 inches diameter for washbasins and sinks, 3 inches for slopsinks, and 4 inches for water-closets. Vent pipes are 1% inches for 1½-inch and 2-inch traps and grease traps, and 2 inches for 3-inch traps and water-closet traps. All 2-inch vent pipes are galvanized or rustless wrought iron; other sizes are cast iron. All brass pipes are extra heavy seamless tubing, tinned inside and outside, except where exposed, where they are polished and nickel-plated, and are subject to a one-year written guarantee. All horizontal pipes are run in four and six-pound lead safes which, where in contact with cement or concrete, are painted with two coats. All safe waste pipes in the cellar discharge through horizontal ends with hinged flap valves and engraved brass labels.

Waste and soil pipes have 3-foot lead pipe connections of the following weights: 1½-inch pipe, 3½ pounds per foot; 2 inch, four pounds; 3-inch, six pounds; 4-inch, eight pounds. All lead waste and soil pipes in contact with cement or concrete, also have two coats of paint. The concealed traps to bathtubs are of extra heavy lead with brass screws. All others are of cast solid brass, nickel-plated, full S, 1½-inch for washbasins, 2 and 3 inches for sinks and washtrays, and 3 inches for slopsinks. Traps in the cellar are cast-iron with brass screws. Tucker No. 2 grease traps are provided in the kitchen and scullery sinks. All exposed pipes connected with brass and porcelain traps are of nickel-plated brass. All vertical vent pipes are connected to soil or wastes below the bottom fixtures so as to discharge into them freely any water, rust, or other accumulation. All cast-iron pipes and fittings have two coats of oil paint after testing. All valves are of Ludlow make, of steam metal, silver-plated where they are exposed to view above the cellar. All cocks are extra heavy with steam metal ground keys. All cast and galvanized pipes were tested with water pressure of a maximum of 40 pounds.

The nine main vertical rainwater conductors have a handhole and brass cap in the foot trap, and are connected at the top to an extra heavy 3.foot length of lead pipe flanged and soldered to the copper gutter. All drains in area, yard court, and driveway have trapped and grated cast-iron cesspools. In the refrigerator room are three and in the butler's pantry is one polished nickel-plated cast-brass floor pan with strainer discharging into a 2-inch waste pipe from the refrigerator to an open sink. In the vicinity of the swimming bath are 11 cast-brass cesspools with bell traps discharging into two 2-inch waste pipes which empty into the cellar sink. Under fixtures marble safes are provided with 1½ -inch galvanized-iron wastes to the cellar sink.

Figure 3 shows the construction and connections of the attic tank, which is made of boiler-iron, stayed, 9'x5'x6' high, and sets in a four-pound lead safe-The tank is furnished with floats that operate a Bracken's patent electric high and low water alarm •(not here shown), which rings a bell near the pump in the basement, where there is also a gauge indicating the height of water in the tank. The tank can be be emptied through a 1½-inch pipe and valve A, and the house supply is drawn through a fine copper strainer in the bottom of the tank and commanded by valve B. The top of the 4-inch overflow terminates in a 4"x4"x5" T, opening upwards so as to form a kind of funnel to receive the ends of the vent and expansion pipes. They are so arranged in order that if any but hot water is discharged through them it may be wasted instead of mixing with the tank cold water. The overflow pipe empties directly into the roof gutter, and its waste is carried off to the sewer through the rainwater leaders.

Figure 4 shows the arrangement and connections of the hot-water heating boilers and air chambers in the cellar, the location of which is indicated at G, Fig. 1. The function of the pipes and the operation of the valves is in general clearly shown in the drawing. The boilers are about 2'6"x6' and hold about 150 gallons each. They are entirely separate and independent, one being connected to the street pressure and the other to the tank pressure system.

Each brass boiler contains a 50-foot coil of 1-inch brass steam pipe which is accessible through hand-hole H. The boilers are supported at the rear end by being built into the wall a few inches, and in front rest on a brick pier P. A is a special street pressure supply to the tank boiler.

As may be seen from Fig. 1, the main distribution pipes A and B connect all branches, and secure free communication to all fixtures, so that if several faucets should be quickly closed simultaneously, they might produce a cumulative water hammer. To absorb this impact Mr. R. Maynicke provided two large air chambers C C to furnish adequate elastic cushions which should automatically receive all shocks and prevent injurious hammer. These tanks are about 5 feet long and 16 inches in diameter, made of ¼-inch riveted steel plates, and communicate with the mains by vertical pipes, open at the foot and extending to 9 inches from the bottom of the chambers. When the water supply is admitted to the system it enters the bottom of these cylinders, and soon stealing up the ends of the pipes, compresses the contained air until its pressure is uniform with the water, and it occupies a proportionately reduced volume in the top of the chamber and expands and contracts in conformity with the variations of pressure, so as to prevent violent strains in the pipes. The petcocks K K are set a few inches below the tops of the chambers so that if when they are tried they show any air, the system will be efficient. If, however, the air becomes absorbed so that the water rises and escapes from the petcocks, the valves B B should be closed and S S and K K opened so that all the water will escape and be replaced by air at atmospheric pressure, which, when the valves are reversed to original positions, will again fill the upper parts of the chamber as shown.