The plumbing inspector or other appropriate official or employee of the county health board shall see that all rules and regulations touching such sanitary plumbing are faithfully and diligently observed and executed. Any person wilfully failing or refusing to comply with any applicable rule or regulation provided and prescribed hereunder, after written notice of such rule or regulation and demand for compliance therewith, shall be guilty of a misdemeanor and, upon conviction thereof, shall be punished by a fine of not more than one hundred dollars or imprisonment of not more than thirty days. Each day, after conviction of any such failure or refusal to comply, that such failure or refusal shall continue shall constitute a separate offense, subject to like conviction and punishment.