Sewage and refuse from showers, bathtubs, toilets, slop sinks and laundries shall be discharged into a sewer system, disposal plant, septic tank or cesspool system of such construction and in such manner as will present no health hazard and in compliance with applicable ordinances and/or statutes. All kitchen sinks, washbasins, bath or shower tubs in any trailer harbored or parked in any trailer camp may empty into a sanitary drain located on the trailer space.