Nick is correct, in NH the discharge line simply terminates within 6 inches off the floor. Slow dripping valves can lead to freeze up if the termination point is exposed to freezing temps, as they are today.

I understand the point about exactly what type of valve it is.

So Jerry are you saying with "which is why it is installed into a tee like that (the probe is down in the tee)."; that it is acceptable to have this "T" fitting?