All of the valves on this page are equipped with 2-1/2" NST threads and are normally in stock.
Akron
Style 2285 Gate Valve
2-1/2" NH inlet and outlet. The perfect non-rising stem hydrant valve if you are worried about water hammer from closing a valve too rapidly. This valve requires a full 21 turns to fully open from the fully closed position. The body is made of high quality aluminum with a maximum working pressure of 250 PSI.
Style 1828 Hydrant Valve
If water hammer is not a concern, this quarter-turn hydrant valve is fast acting. The valve is equipped with "Tork-Lok" which prevents water acting on the ball from moving its position. 2-1/2" NH threads on each end.
Reliable
Reliable model GV gate valve
Protek
Protek model 595 Hydrant Valve