Eroded Pipeline is the second checkpoint in The Depths. Apart from the underwater minefield, you will not encounter any dangers here and you will not have to deal with any puzzles. The journey through the Eroded Pipeline is a short break before fighting the Boss.
Remember to mark the checkpoint. Before you set off on your way, it's a good idea to do some business with Vulgrim and move to the Maker's Forge to improve your equipment.
In front of you, there is an underwater lake. Under the ceiling, you can see a sinister-looking "something". Whatever it is, it certainly doesn't promise anything good. Jump into the water and swim ahead, but watch out for two guided mines.
There is a minefield ahead of you. As you proceed, you are sure to take some damage. The best and safest road is on the left, behind the pillar. The mines will crash into underwater boulders and you will safely cross over to the other side.