As necessity may arise, as in the case of breakdown, emergency or for any other unavoidable cause, the Township shall have the right to temporarily cut off its sewer service to make necessary repairs, connections or other work, using all reasonable and practicable measures to notify the occupants of the premises of such discontinuance of service and the probable duration of such discontinuance. The Township undertakes to use reasonable care and diligence to provide sewer service to its lines but does not undertake to render any special service or to maintain any privately owned or household fixture or definite quantity of use, and in the event of the occurrence of any break, failure or incident or damage to property or of injuries by act of God or by public enemy, and unless caused by its negligence, the Township shall not be liable therefor.