Gas Networks Ireland builds and operates the natural gas networks in Ireland, mainly on behalf of Gaslink. Bord Gáis Networks connects all customers to the network regardless of the chosen natural gas supply company.

Gas Networks Ireland network consists of 2,321km of high-pressure steel Transmission pipes and over 10,500km of Distribution pipelines. Gas is received from the Transmission network and delivered through the Distribution network to over 630,000 residential, business and industrial gas users.