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height. The 30-feet shall be measured from the base of <br /> the stack at its lowest point to the uppermost ceiling. The <br /> extension of the vents through the roof may be of the same <br /> material. " <br /> Section 23 <br /> That Chapter 4 , Table 4-1, of the Uniform Plumbing Code <br /> herein adopted is hereby amended to read as follows: <br /> TABLE 4-1 <br /> MINIMUM <br /> TRAP & TRAP <br /> KIND OF FIXTURE ARM SIZE UNITS <br /> Bathtubs 1-1/2" 2 <br /> Bidets 1-1/2" 2 <br /> Dental Units or Cuspidors 1-1/4" 1 <br /> Drinking Fountains 1-1/4" 1 <br /> Floor Drains 2" 2 <br /> *Interceptors for grease, oil, solids, etc. . 2" 3 <br /> *Interceptors for sand, auto wash, etc 3" 6 <br /> Laundry tubs 1-1/2" 2 <br /> Clothes Washers 2" 2 <br /> *Receptors (floor sinks) indirect waste recep- <br /> tors for refrigerators , coffee urn, water <br /> stations , etc 1-1/2" 1 <br /> *Receptors, indirect waste receptors for com- <br /> ercial sinks , dishwashers , airwashers , etc. . 2" 3 <br /> Showers , single stalls 2" 2 <br /> *Showers , gang (one unit per head) 2" <br /> Sinks, bar, private (1-1/2" min. waste) 1-1/2" 1 <br /> Sinks , bar, commercial (2" min. waste) 1-1/2" 2 <br /> Sinks , commercial or industrial, schools , etc. , <br /> including dishwashers, wash up sinks and <br /> wash fountains (2" min. waste) 1-1/2" 3 <br /> Sinks , flushing rim, clinic 3" 6 <br /> Sinks and/or dishwashers (residential) <br /> (2" min. waste) 1-1/2" 2 <br /> Sinks , service 2" 3 <br /> Trailer park traps (one for each trailer) . . . 3" 6 <br /> Urinals , pedestal 3" 6 <br /> Urinals , stall 2" 2 <br /> Urinals , wall (2" min. waste) 1-1/2" 2 <br /> Urinals , wall trough (2" min. waste) 1-1/2" 3 <br /> Wash basins , (lavatories) single 1-1/4" 1 <br /> Wash basins , in sets 1-1/2" 2 <br /> Water closet tank type 3" 6 <br /> Water closet flush valve type 3" 6 <br /> *NOTE: The size and discharge rating of each indirect waste <br /> receptor and each interceptor shall be based on the total rated <br /> discharge capacity of all fixtures , equipment or appliances dis- <br /> charging thereinto in accordance with Table 4-2. <br /> Drainage piping serving batteries of appliances capable <br /> of producing continuous flows shall be adequately sized to <br /> provide for peak loads. Clothes washers in groups of 3 or <br /> more shall be rated at 6 units each for the purpose of common <br /> waste pipe sizing. <br /> Trap sizes shall not be increased to a point where the <br /> fixture discharge may be inadequate to maintain their self <br /> scouring properties . <br /> Section 24 <br /> That Chapter 4 , Table 4-3 , of the Uniform Plumbing Code <br /> herein adopted, is hereby amended to read as follows: <br />