A. The walls and bottom of the trap shall be not less than four inches thick. The inside dimensions of the trap shall be not less than five feet long, three feet wide and three feet deep below the bottom of the outlet pipe. The inlet pipe shall be at one end and the outlet pipe at the opposite end of the trap. The pipes shall be not less than four inches in diameter and their tops shall be not less than six inches below the top of the trap.

B. The outlet pipe shall extend into the outlet compartment of the trap as described below and shall be equipped with a four-inch "T" branch set vertically downward. A section of four-inch pipe shall extend downward from the "T" branch to a point not less than twelve inches below the bottom of the outlet pipe. The straight end of the outlet pipe in the sand trap shall be fitted with a stopper or plug.

C. A baffle wall of concrete or wood extending entirely across the trap shall be constructed parallel to and twelve inches from the inside of the end wall at the inlet end. The bottom of this baffle wall shall be parallel to and six inches above the bottom of the trap, the top being flush with the top of the trap.

D. Another baffle wall of concrete or wood extending entirely across the trap shall be constructed parallel to and twelve inches from the inside of the wall at the outlet end of the trap. The top of the baffle wall shall be parallel to and twelve inches below the top of the trap, and the wall shall extend down to the bottom of the trap.

E. The compartment formed by the outlet wall and the baffle wall twelve inches therefrom shall be covered with a solid, removable cover.

F. The remainder of the sand trap shall be covered with a removable grating, which may be in sections of any convenient size to facilitate removal for inspection and cleaning of the sand trap.

G. Such sand traps shall be inspected daily when in use, and cleaned as often as necessary for their efficient operation.

H. It is unlawful for any person, firm or corporation to connect any cellar drain and shower, in basements or in yards, directly with the soil or waste pipe, but such cellar drain or shower shall be trapped by a sand trap of not less than twelve inches by twelve inches and constructed of concrete. The walls and floor of every such trap shall not be less than three inches thick, and each trap shall have a cast iron frame and grate cover. The water seal of such trap shall be constructed by inverting its waste pipe. A water seal of less than four inches is prohibited, and the minimum size of the waste pipe shall be four inches where the trap is not vented. Such sand traps shall be cleaned as often as necessary for their efficient operation. (Ord. 576, 2008; Ord. 199 §15, 1975. Formerly 13.12.160).