Since Lawn Belt is an inline system, branching the system in different directions using a T fitting is not recommended. A T connection should be your last resort when designing your sprinkler system.
Because Lawn Belt can weave around obstacles using wide turns, you can almost always avoid using a T connection.
But if you absolutely need to create a “T” you can do so – You will need a 1/2″ Barbed T fitting – like this one at Amazon – plus you’ll need 3 Lawn Belt converter kits for each end of the T and 3 collar kits as well.
Also in addition your Psi must be adequate when using a T connection and is suggested that your PSI reading be 70 or above.