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"In public coin-operated laundries and in the central washing facilities of multiple-family dwellings, the rooms containing automatic clothes washers must be provided with floor drains located to readily drain the entire floor area. Such drains shall have a minimum outlet of not less than ______________ . A. 2-inch-diameter (51 mm) B. 3-inch-diameter (76 mm) C. 4-inch-diameter (102 mm) D. 5-inch-diameter (128 mm)!"

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