This modular gas manifold will allow you split one CO2 line to three of them. Each line can be turned off individually without affecting the flow to other kegs. Each ball valve contains a check valve that ensures no beer or gas can flow between the two kegs. The barbs are all 5/16" which is standard for gas line in the beer industry.
If later, you decide to add an additional keg this manifold can be expanded using the Add On Assembly.