We purchased a cottage this spring and I have replaced the water lines under the cottage with PEX pipes. Most of the lines are 3/4" and I use a combination of Sharkbite push to connect and crimped connections. We draw water from a submerged pump from a lake into a pressurized water tank. The problem we have is that air is building up in the water lines and it causes issues with water and air spraying out of the faucets. I do not see any signs of water leaking under the cottage. How do I find the source of the air leaking into the pipes?