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16. Sump pumps: <br />a. Cannot drain into sanitary or storm sewer; <br />b. Must daylight into lawn away from foundation; <br />C. Perimeter foundation systems must day light or drain <br />into sump pit and then sump pump, and sump pump must drain into lawn. <br />feet. <br />17. Drainage from house: slope at least six inches in the first ten <br />18. Retaining walls: <br />a. Less than 48 inches from the bottom of the footing to <br />the top of the retaining wall with no surcharge: no permit required. <br />b. More than 48 inches from bottom of footing to top of <br />retaining wall, or any wall with surcharge: requires stamped engineering plans. <br />19. Backflow preventer: required on all residential irrigation <br />systems (see cross connection control regulations). <br />20. Hot water heaters: <br />a. Expansion tanks required for all hot water heaters; <br />b. Drain pan required if placed on wood floor. <br />All new heated commercial and residential heated structures constructed <br />pursuant to the 2018 IECC shall meet the requirements of Chapter 15.60 of this <br />Code. <br />Section 5. Section 15.18.060 of the Louisville Municipal Code is hereby amended to <br />read as follows (words to be added underlined; words to be deleted stricken): <br />Sec. 15.18.060 Copies available. <br />At least one copy of the International Energy Conservation Code, 2021 Edition, as amended <br />herein, and the International Energy Conservation Code, 2018 Edition, as amended herein, each <br />certified to be true and accurate, shall be available for public inspection at the office of the Building <br />Safety Division, during business hours. The city clerk shall at all times maintain a reasonable supply <br />Ordinance No, 1825, Series 2022 <br />Page 6 of 12 <br />