to
be furnished by said board or bureau. Where two or more
buildings are located together and on the same street, and the
plumbing work is identical in each, one plan will be
sufficient. Plans will be approved or rejected within 24 hours
after their receipt.

SEC. 3. MATERIAL OF HOUSE DRAIN AND SEWER.--House drains or
soil pipes laid beneath floor must be extra heavy cast-iron
pipe, with leaded and caulked joints, and carried 5 feet
outside cellar wall. All drains and soil pipes connected with
main drain where it is above the cellar floor shall be extra
heavy cast-iron pipe with leaded joints properly secured or of
heavy wrought-iron pipe with screw joints properly secured
and carried 5 feet outside cellar wall and all arrangements
for soil and waste pipes shall be run as direct as possible.
Changes of direction on pipes shall be made with "Y"-branches,
both above and below the ground, and where such pipes pass
through a new foundation-wall a relieving arch shall be built
over it, with a 2-inch space on either side of the pipe.

SEC. 4.--The size of main house drain shall be determined by
the total area of the buildings and paved surfaces to be
drained, according to the following table, if iron pipe is
used. If the pipe is terra-cotta the pipe shall be one size
larger than for the same amount of area drainage.

----------+-----------------------------+---------------------------------
Diameter | Fall 1/4 inch per foot | Fall 1/2 inch per foot
----------+-----------------------------+---------------------------------
4 inches | 1,800 square feet drainage | 2,500 square feet drainage area
5 inches | 3,000 square feet drainage | 4,500 square feet drainage area
6 inches | 5,000 square feet drainage | 7,500 square feet drainage area
8 inches | 9,100 square feet drainage | 13,600 square feet drainage area
10 inches | 14,000 square feet drainage | 20,000 square feet drainage area
----------+-----------------------------+---------------------------------

The main house drains may be decreased in diameter beyond the
rain-water conductor or surface inlet by permission of the
bureau, when the plans show that the conditions are such as to
warrant such decrease, but in no case shall the main house
drain be less than 4 inc