5056

COUNTY LOCAL LAWS

NOTE 2: ASTM Standards are issued under fixed
designations; the final number indicates the year of
original adoption, or in the case of revision, the year
of last revision. "T" indicates Tentative. In the CS
series of standards, also, the final number indicates the
year of issue. For Federal Specifications, the year
indicated in Table 3.1.3. is that of the date of issue or
that of the latest revision or amendment.

NOTE 3: All standards and specifications for materials
are subject to change. Designations carrying indication
of the year of issue may thus become obsolete. Table
3.1.3. gives the full designations of standards current
at the time this Code is printed. The Administrative
Authority is required to review this table and have it
brought up to date at intervals not exceeding two years.

TABLE 3.1.3

"NOTE": STANDARDS ON MATERIALS DO NOT IMPLY THAT THESE
MATERIALS MAY BE USED FOR A SPECIFIC SERVICE. MATERIALS
PERMITTED FOR A SPECIFIC SERVICE SHALL BE SPECIFIED UNDER
THE VARIOUS CHAPTERS OF THIS CODE.

6.6 Drainage Below Curb Level

6.6.1 Fixtures Subject to Backflow

Drainage piping serving fixtures that are located
below the elevation of the curb at the point where the
building sewer crosses under the curb [or] AT property
line and above the crown level of the main sewer, may
drain by gravity into the main sewer and [shall] MAY be
protected from backflow of sewage by installing an
approved type of back water valve.

6.6.2 Fixture Branches Subject To Backflow

Backwater valve [shall] MAY be installed only in
that branch or section of the drainage system which
receives the discharge from fixtures [located] as stated
in 6.6.1.

7.17.3  Residential Sink and Dishwasher

The discharge from a sink and dishwasher may
discharge through a single 1 1/2 inch trap, but the
discharge from the dishwasher must be through an approved
air gap fitting. The discharge from the air gap to be
immediately increased to a minimum of [1] 3/4 inch and be
connected with a "Y" fitting between the sink outlet and
the trap inlet [.], OR INTO THE HEAD OF THE DISPOSAL.

7.17.4  Residential Sink, Dishwasher and Disposal