AIR CONDITIONING AND REFRIGERATION

Metropolitan Code of Nashville and Davidson County tit. 15, div. I, ch. 15.56

in effect

Metropolitan Code of Nashville and Davidson County § 15.56.010 Effect on other building regulations.

15.56.010 - Effect on other building regulations. This chapter is not to be construed as relieving any permittee under this chapter from complying with metropolitan government building laws and from obtaining proper permits required under such building laws. (Prior code § 40-1-163)

Metropolitan Code of Nashville and Davidson County § 15.56.020 Installation—Permit required—Exceptions.

15.56.020 - Installation—Permit required—Exceptions. No person shall install, remodel or add to any air conditioning or refrigerating system which uses water from the metropolitan government water supply without first having procured a written permit therefor from the department; provided, that this section shall not apply to systems with a total rated capacity of less than two tons per twenty-four hours. (Prior code § 40-1-164)

Metropolitan Code of Nashville and Davidson County § 15.56.030 Application for permit.

15.56.030 - Application for permit. Application for a permit required by Section 15.56.020 shall be made to the director and shall provide such information concerning the proposed equipment and the installation thereof as may be required by the director. (Prior code § 40-1-165)

Metropolitan Code of Nashville and Davidson County § 15.56.040 Installation—Regulations.

15.56.040 - Installation—Regulations. A. On air conditioning or refrigeration installations which operate with the use of water directly from the public supply, every direct connection shall be equipped with a suitable brass body, brass-fitted check valve installed in the branch supply line to each unit. B. Discharge connections for the disposal of wastewater shall be in strict accordance with applicable rules and regulations of state and local health and regulatory bodies. C. Cooling waters which are to be used for other purposes shall be provided with free, above the rim, discharge before entering other equipment; otherwise, permission shall be obtained in writing from the director, approving the proposed connection and use. D. On installations other than those described above, there shall be a physical break between the public supply piping and the piping of the installation, arranged so as to make impossible back siphonage to the public supply system. (Prior code § 40-1-167)

Metropolitan Code of Nashville and Davidson County § 15.56.050 Use of public waters restricted—Conservation regulations.

15.56.050 - Use of public waters restricted—Conservation regulations. A. No water from the public supply shall be used by any air conditioning or refrigeration system having a total rated capacity of two tons per twenty-four hours and above unless such air conditioning or refrigerating system is equipped with evaporative condensers, cooling towers, spray ponds or other approved water cooling equipment. This equipment shall be of sufficient capacity to insure that the maximum requirements for makeup water when operating under full loading at maximum summer temperatures will not exceed 0.2 gallons per minute per ton of capacity; provided, that systems with a total rated capacity of less than two tons per twenty-four hours may use water from the public supply if equipped with an automatic valve on each unit which will stop the flow of water when the unit is shut down and throttle the flow of water down to the momentary requirements of the system. B. Water regulating devices which will minimize the waste of water shall be installed on all manufacturing processes which require the use of water from the public supply. C. In the event any person maintains such air conditioning or refrigerating equipment described in this section which is supplied with water from a source other than the public supply, but who has a service connection to the metropolitan government's sewerage system into which excessive use of water by such air conditioning or refrigerating equipment would discharge, then, such person shall be subject to all regulations prescribed in this section for the conservation of water the same as if they were obtaining water from the public supply. (Prior code § 40-1-166)

Metropolitan Code of Nashville and Davidson County § 15.56.060 Violation—Discontinuance of water.

15.56.060 - Violation—Discontinuance of water. In addition to any other penalty imposed for any violation of this chapter, the director shall have the right to discontinue metropolitan government water service to any premises upon which there is found to exist a violation of any provision of this chapter which might affect adversely the public health. (Prior code § 40-1-168)

Source: Metropolitan Government of Nashville and Davidson County, Metropolitan Code and Charter (Municode Library, library.municode.com)URL: https://library.municode.com/tn/metro_government_of_nashville_and_davidson_county/codes/code_of_ordinances?nodeId=CD_TIT15WASEOTPUSE_DIVIGERE_CH15.56AICOREFetched: 10/28/2026