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The drainage fixture unit load of an indirect waste receptor receiving the discharge of indirectly connected fixtures shall be the sum of the drainage fixture unit values of the fixtures that discharge to the receptor but not less than the indirect waste receptor drainage fixture value given in Table 18-29-709.1 or Table 18-29-709.2.
(Amend Coun. J. 10-14-21, p. 37722, Art. VII, § 10)
Where waste receptors such as floor drains, floor sinks and hub drains receive only clear-water waste from display cases, refrigerated display cases, ice bins, coolers and freezers, such receptors shall have a drainage fixture unit value of one-half.
(Added Coun. J. 10-14-21, p. 37722, Art. VII, § 10)
The maximum number of drainage fixture units connected to a given size of building sewer, building drain or horizontal branch of the building drain shall be determined using Table 18-29-710A. The maximum number of drainage fixture units connected to a given size of horizontal branch or vertical soil or waste stack shall be determined using Table 18-29-710B.
Combined building drains and combined building sewers shall be sized in accordance with Sections 18-29-1106 and 18-29-1108.
(Amend Coun. J. 10-14-21, p. 37722, Art. VII, § 11)
The minimum required pipe size for water closets or pedestal urinal branches and stacks shall be 4 inches (100 mm).
Exception: A building three stories or less in height may utilize a 3-inch (75 mm) soil stack and 3-inch (75 mm) horizontal soil branches when not exceeding 48 fixture units, with not more than six water closets per soil stack and not more than three water closets per horizontal soil branch.
The minimum required pipe size for underground branches from downspouts, floor drains, laundry trays and sink stacks shall be 2 inches (51 mm).
(Amend Coun. J. 10-14-21, p. 37722, Art. VII, § 11; Amend Coun. J. 12-14-22, p. 58278, Art. VI, § 17)
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