Couplings: Joins two straight pieces of PEX.
Elbows (90° and 45°): For making sharp turns (though PEX can bend naturally, elbows are used for tight corners).
Tees: Splits a single line into two directions (available as equal tees or reducing tees).
Adapters: Connects PEX to Male NPT threads, Female NPT threads, or copper sweat (solder) connections.
Manifolds: A central hub that takes a main water supply line and splits it into multiple dedicated PEX runs for individual fixtures.