I took out some dead bushes around my pool and in doing so I found this pvc capped pipe. It is directly on line with a "vent"on the side of my pool. What is this for? The cap just comes right off. There is no pressure so no water flows out. I am just curious why it is there and what it might be for.
You can see it on the image attached. On the right side under the water next to the light is the vent and the left side outside of the screen enclosure is the capped pipe. The vent in the water just has a gate over it.