Establish gas service with Austell Natural Gas. Simply fill out the below form or call 770-948-1841, option 4. Provide the service address to the customer service representative. A minimum deposit of $100 is required but can be waived by providing a letter of credit from a current or previous gas or electric provider for the most recent 12 months indicating no late payments and no disconnections of service. Letters of Credit excluding 12 month payment and disconnect history will not be accepted.