A.
All plumbing and drainage systems, water-supply pipes, gas piping, steam or hot-water-heating or power systems, refrigerator systems and other systems of pipes or apparatus for holding or conveying gases, vapors or fluids hereafter installed and maintained in or upon any building in the Town of Rye outside the limits of any incorporated village therein, shall conform to these rules and as may be further provided for by law or found necessary for the protection of life, health and property, as adopted by the Town Board of the Town of Rye. No person shall use or permit the use of such system, piping or apparatus installed or maintained in violation of any of the provisions of this chapter or the rules adopted hereunder.
B.
Nothing herein contained or in the rules adopted here-under shall require the alteration or reconstruction of any existing work that was lawfully installed, or permit repairs or the addition of new fixtures to existing work in conformity with the practice followed in the original installation; provided, however, that when such repairs involve the removal or alteration of more than 1/2 of the existing work affected by the repairs, these rules for such repairs shall apply.