I have air that is in my return lines. Pool is 1 year old. 7000 gallon, swg. Pics of equipment below. I have had builder out multiple times over course of the past year to try to find the leak. So far no success. They've tested the 3 return lines via pressure test and came back ok. They tested equipment at pad and found no leak there, but they said they didn't test for leaks below pad. Pool has 2 bubblers that do not appear to have any bubbles in them. The bubbles only appear in the 3 return lines. So being that the pressure tests came back ok I can only assume the leak is back at the equipment pad. Ive been told by multiple people my equipment is too big for the size of my pool. The main skimmer basket always has a air bubble in it unless I run VSP at max speed, but have been told not to do that as pump is too strong for plumbing and it might do some damage. So I run it between 1700-2700. The higher the speed the finer the air bubbles, the lower the speed the bigger and more visible are the air bubbles coming out of the return lines. Amy thoughts as to where this air is getting into system. Extremely frustrated about the pool builders lack of effort and ability to solve this issue. Any help would be greatly appreciated.