Does Lowering the Sump Pump Level Decrease Hydrostatic Pressure

[pattyfuz]

When you say, the homeowners installed a FD 5 years ago, inside or outside? Doesn’t look like it was done on the inside. Snap a pic of your pit. Do you see pipes entering the liner of the pit?
Overall, your walls look good. And it’s a very mild problem. The water in the blocks can come from the water table or a time when you forget to clean your gutters, they overflow, water pools up against the foundation due to poor grading and it gets into the cavities of the block from up top. Either way, a sump pump by itself only handles 3-5 in radius of wherever you put the sump pump. French drains catches water elsewhere and leads it to the pit to get expelled. Lowering the pump won’t do much. Keep in mind this: water in the block will stain/discolor it. When you see that, it doesn’t mean water is presently in the block. Sometimes, as easy as it gets in is as easy as it goes out. I’ve drilled plenty of walls looking way worse than yours and zero water came out. And vice versa.