I just had a side yard of pavers installed with a 3 ft wood burning fire pit. Here is my concern. The fire pit is located directly over the pool lines to the pump. The ground was dug out to where the lines are located for draining purposes and filled with small river rocks. Is it safe for the lines to have wood burning fires in the pit? Will the rocks get too hot and damage lines? There is about 3-4 feet of stones. Any experience or recommendations appreciated.