Town gas issues are managed by City Energy. You may contact them online or call 1800-555 1661 to apply for town gas supply. City Energy can only assist to install exposed gas pipes in HDB premises, as well as gas appliances in both HDB and private premises. For all other installation of gas pipes and appliances, you will need to engage a Licensed Gas Service Worker to assist you. After installation is completed, City Energy will fix the gas meter and ensure appropriate tests are performed before turning on the gas supply. City Energy will issue a Statement of Turn-on and a written statement certifying that the appliances have been tested and are safe for use. Do retain these statements for your record.