A
No substance which will clog the pipes, produce explosive mixtures, destroy the pipes or their joints or interfere unduly with the sewage disposal process shall be allowed to enter the building drainage system.
B
Water closet must be located in a room which is properly lighted and ventilated.
C
Plumbing shall be designed and adjusted to use the maximum quantity of water consistent with proper performance and cleaning.
D
Each fixture directly connected to the drainage system shall be equipped with a water-sealed trap.