Grantee shall not discontinue the distribution of gas through its distributing system, or any portion thereof, for an unreasonable length of time for the purpose of making repairs and extensions, but Grantee shall not be liable to the Town or to any consumers for damages caused by such temporary discontinuance or interruption of the delivery of gas; provided, that such repairs and extensions are made with reasonable diligence. (1977 Code § 12.30.040)