No steam exhaust blow-off or drip pipe shall connect with any house drain or sewer directly. Such pipe must discharge into a tank, basin or other condenser from which a suitable outlet to the public sewer may be provided and it shall be unlawful for any person, firm or corporation to discharge water of a higher temperature than one hundred twenty (120) degrees Fahrenheit into any public sewer in the city. (Prior code § 38-3-16)