Which pipe is leaking?And why is water gushing out of it when I turn on my pump?
Probably. Does the water come out with a lot of force when you turn on the pump? What level does the water recede to when you turn off the pump?Could I just cap this?
The pipe is connected to the skimmer. That is pretty clear from your statement. But is the other port of the skimmer connected to one of the other pipes shown in the picture. In other words, is that skimmer "active" where you can see water flowing into it. If it is active, then I would just plug that pipe (from the skimmer end) because it may of had a leak at one point which is why it was abandon.It's actually the the open pipe that is almost buried in the ground. As soon as I removed the plug from the skimmer, water begins to flow from this.