Sec. 491(11). Open drains and vent pipes.
Cellar drains and area drains will be permitted when they are
connected with an approved back water trap in connection with
a deep seal trap.
Drains into which the washing from automobiles or other
liquids or substances of such nature as would be likely to stop
up the sewers into which such drain empties, must be properly
constructed and operated with sand trap; and no person, firm or
corporation shall discharge into the sewers any substances of
such nature as will stop up any sewer within the City.
Cellar drains and sand traps will not be required to be vented
when within fifteen feet of main or branch waste pipe, which
extends through roof.
Where a fixture is allowed to discharge into an open drain,
a trap, but no vent will be necessary, but the waste pipe must
not exceed fifteen feet in length unless approved by the inspector.
The fixtures must be connected with sewer where sewer is
available.
