This might be a stupid question and I will probably not explain it properly, but I have an inground pool and I have a leak in the pipe that is going back towards the pool. The leak is right before the 90 degree elbow before the pip heads underground. There is a connector and I can see that its attached to a threaded part of pipe but I can't turn the connector at all. As you can tell I have no idea what i'm talking about. I'm just not sure how to fix a leak in the fixed pipes, if that makes sense.