onts,
then the water from said leader shall be conducted, by proper
pipes below the surface of the sidewalk, to the street gutter.

Inside leaders shall be constructed of cast iron, wrought iron
or steel, with roof connections made gas-and water-tight by
means of heavy copper drawn tubing slipped into the pipe. The
tubing must slip at least 7 inches into the pipe. Outside
leaders may be of sheet metal, but they must connect with the
house drain by means of cast-iron pipe extending vertically 5
feet above grade level, where the building is located along
public driveways or sidewalks. Where the building is located
off building line, and not liable to be damaged the connection
shall be made with iron pipe extending 1 foot above the grade
level.

All leaders must be trapped with running traps of cast iron,
so placed as to prevent freezing.

Rain leaders must not be used as soil, waste or vent pipes,
nor shall such pipes be used as rain leaders.

SEC. 15.--EXHAUST FROM STEAM PIPES, ETC.--No steam discharge
or exhaust, blow-off or drip pipe shall connect with the sewer
or the house drain, leader, soil pipe, waste or vent pipe.
Such pipes shall discharge into a tank or condenser, from
which suitable outlet to the sewer shall be made. Such
condenser shall be supplied with water, to help condensation
and help protect the sewer, and shall also be supplied with
relief vent to carry off dry steam.

SEC. 16. DIAMETER OF SOIL PIPE.--The smallest diameter of soil
pipe permitted to be used shall be 4 inches. The size of soil
pipes must not be less than those set forth in the following
tables.

Maximum number of fixtures connected to:

-------------+-------------------------+------------------------------
Size of pipe | Waste and soil combined | Soil pipe alone
+------------+------------+---------------+--------------
| Branch | Main | Branch | Main
| fixtures | fixtures | water closets | water closets
-------------+------------+------------+---------------+--------------
4-inch | 48 | 96 | 8 | 16
4.5-inch | 96 | 192 | 16 | 32
6-inch | 268 | 336 | 34 | 68