This No Lead Brass tee is perfect for pressure tank installations with 1" FPT Union to the tank has a 1" Male connection.  For example, WellMate WM-6, WM-9, WM-12

Tank connection: 1" MPT
The side ports are 1" MPT / 3/4" FPT
The top ports are 1/4" FPT (for pressure switch / pressure gauge)
The front ports are 1/2" FPT (for pressure relief valve / boiler drain)
Center End Length: 3 1/2"

It can be used with 1" FPT Union to become 1" FPT tank connection