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It 1470 371 vented as directed by inspector of Plumbing. No traps are to be less than 1.1" in;,ide diameter or 11" if they are brass traps. have trap screws. All traps 2" and less in diameter are to Lead Waste pipes Lire to be of weight known in commerce as "D". traps and bends to be of weights known as ,3tandard. 2errules are to be of brass, extra heavy and four inches long. Cleanouts shall be of acceptable material and construction. Brass pipe for traps and fixture connections to be not less than 17 gauge. Vertical waste pipes to receive discharge from not more than 8 sinks, baths, lavatories, wash trays or similar fixtures shall be not less than 2" diameter and with branches not less than 1111. Connections between cast iron and lead pipes to be made with brass ferrules wiped onto lead pipe and calked into cast iron hubs. Connections between cast iron and screwed pipe to be made with cast iron fittings tapped and threaded or with screw pipe couplings calked into cast iron hubs. Connections between screwed pipe and lead pipe to be made with brass solder- ing nipples, wiped onto lead pipe. Connections between lead waste pipes brass waste pipes and traps and lead pipes to be made with whiped joints and between brass waste pipes and traps and screwed pipe to be made with recessed sweat bushings, or metal to metal ground joint connections. Packed slip joint connections will be permitted on the sewer side of traps. Lead drum traps to receive waste from Bath tubs, or bath tubs and lavatories, ,need not be back vented when within 4 ft. of lain waste pipe and where no water closets are located above such bath tub or lavatories. in cases where this distance exceeds 4 ft the Lead drum trap must be. bacit vented by 11" vent pipe. 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 washings from automobiles of 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 sand trap; and no person, firm or corporation shall discharge into the sewers any substances of such nature as will stop up an;; sewer within the City. Cellar drains and sand traps will not be requi, ed to be vented when within fifteen feet of main or branch wac3te 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 treivaste pipe must not exceed fifteen feet in length un - .16 less approved by the Inspect o . 'he fixtures must be connected with sewer where sewer is available. '48, DOWNSPOUT CONNEC' 10115. The connection of downspout: