All plumbing fixtures and drains used to receive
or discharge liquid wastes or sewage shall be connected to the drainage
system of the building or premises in accordance with the requirements
of this code.
Lavatory waste outlets. Lavatories shall have
waste outlets not less than 1 1/4 inches in diameter. A strainer,
pop-up stopper, crossbars or other device shall be provided to restrict
the clear opening of the waste outlet.
Bathtub waste outlets and overflows. Bathtubs
shall have waste outlets and overflows at least 1 1/2 inches
in diameter and the waste outlet shall be equipped with a suitable
stopper.
Sink waste outlets. Sinks shall be provided
with waste outlets not less than 1 1/2 inches in diameter. A
strainer, crossbar, or other device shall be provided to restrict
the clear opening of the waste outlet. Sinks on which a food grinder
is installed shall have a waste opening not less than 3 1/2 inches
in diameter.
Water shall be supplied to all dishwashing machines
and the water lines shall be protected against backflow by an air
gap or backflow preventer.
A. Residential dishwashing machines. Residential Dishwashing
Machines may discharge separately into a trap, tailpiece (inlet side)
of the kitchen sink, or the dishwasher connection of a food waste
disposal. The discharge hose shall be installed to a height just below
the counter top before connecting to the drain.
B. Commercial dishwashing machines. When a commercial
dishwashing machine is located adjacent to a floor drain, the waste
from the dishwashing machine may be connected direct on the sewer
side of the floor drain trap, provided that the drain line from the
dishwashing machine is properly trapped and vented.
A water supply line to an automatic clothes
washer shall be protected against backflow by the use of an air gap
or backflow preventer. The discharge from such a machine shall be
through an air break.
Laundry tray waste outlet. Each compartment
of a laundry tray shall be provided with a waste outlet not less than
1 1/2 inches in diameter and a strainer or crossbar to restrict
the clear opening of the waste outlet.
Garbage can washers shall be separately trapped.
The receptacle receiving the wash from garbage cans shall be provided
with a removable basket or strainer to prevent discharge of large
particles into the building drainage system. Any water supply connection
shall be protected against backflow by an air gap or a backflow prevention
device.
In addition to complying with all applicable
provisions of this chapter, all plumbing fixtures installed shall
be in accordance with all applicable Federal and State regulations,
now or hereafter promulgated, regarding water usage and conservation.