18-29-1103 Traps.

18-29-1103.1 Main trap.

   Leaders and storm drains connected to a combined sewer shall be trapped. Individual storm water traps shall be installed on the storm water drain branch serving each conductor, or a single trap shall be installed in the main storm drain just before its connection with the combined building sewer or the public sewer. One trap may serve more than one downspout, and any such trap shall be on the downstream side of the connection to any sanitary sewer or any combined sewer or drain, and shall be set where not subject to frost.

18-29-1103.2 Material.

   Storm water traps, when required, shall be of the same material as the piping system to which they are attached.

18-29-1103.3 Size.

   Traps for individual conductors shall be the same size as the horizontal drain to which they are connected.

18-29-1103.4 Cleanout.

   An accessible cleanout shall be installed on the building side of the trap.

18-29-1104 Conductors and Connections.

18-29-1104.1 Prohibited use.

   Conductor pipes shall not be used as soil, waste or vent pipes, and soil, waste or vent pipes shall not be used as conductors.