Give all the joints a few minutes to dry; then begin sliding the entire line into the open trench. Wrap Teflon tape around the threads of a PVC male adaptor and attach it to the female end of the hydrant.
Next, apply PVC primer and cement to a 90-degree elbow and the unattached section of PVC pipe. Slide the elbow onto the pipe. Making sure the pipe is even with the base of the hydrant, grab the other section of line, cross the two and cut the overlap with a PVC saw. Now, prime and cement the two ends of pipe, along with a coupling, slide the assembly together and place it in the trench. For the hydrant to drain properly, dump a bag of gravel into the open pit (Image 1).
Before mounting the hydrant, rub a generous amount of primer and cement on the exposed elbow and the male adaptor; then attach the hydrant. Lastly, fill in the pit with the dirt removed from the trench (Image 2).
For additional support, pour a bag of concrete over the top (Image 3) and add water to the mix.