It shall be unlawful to use house sewers for any purpose other than carrying off house sewage, or to place in any house sewer any foreign matter that may not be promptly dissolved or that may cause obstruction in the sewer. It shall be unlawful to cause or permit the exhaust, blow-off, drip pipe, or sediment from any boiler, or the discharge of large volumes of hot water, to be discharged into the sewer. Water of temperature greater than 120°F. shall not be discharged into the sewer.
('70 Code, Ch. F, Art. II § 11) Penalty, see § 51.99