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Any existing residential building undergoing rehabilitation, remodeling, addition or repair pursuant to the provisions of this chapter, and which does not exceed four stories in height may utilize a three-inch soil stack in a four story building with a plumbing fixture unit capacity not exceeding 60 fixture units and in a building three stories or less in height with a plumbing fixture unit capacity not exceeding 30 fixture units, with not more than two water closets per floor or two water closets per horizontal branch, with no installation exceeding six water closets per stack. The waste connections to any water closet shall be provided with an approved four-inch closet flange. All additional modifications or alterations to an existing plumbing system shall meet the requirements of Chapter 18-29 of the Municipal Code.
(Prior code § 78.1-45; Amend Coun. J. 5-16-90, p. 15706; Amend Coun. J. 3-28-01, p. 55444, § 6)