The unusual construction of my house exterior wall did not permit running a water supply line in a straight line with the stem of the house hydrant. I needed to run a line to the stem at a right angle. Since I am not using copper pipe with sweat joints, I elected to use a push-to-connect connector with NPT threads on the other end to connect to the inlet. After preparing and screwing in the NPT into the inlet, I only had to push to connect the line to the other end of the NPT, and it works great. The inlet can be adjusted (if turned less than one turn) to align the inlet with the incoming water line. This makes installation so much easier.
But ensure you measure properly, compensating for depth of the angled base of the debris cover, the mounting plate, and the change in length of the stem when the standard inlet is removed and the elbow inlet is installed. The measurements will be different than the regular thickness of your wall, and the length to the inside edge of the elbow inlet will be shorter than the listed length of the stem.
(AND THE CUSTOMER SERVICE IS GREAT!!!)