You need to go over every connection and re-tighten it, especially if the pump is a jet pump. They are notorious for being picky about air leaks down towards the well ( on the suction pipe). ALL connections should be heated as you tighten them to ensure an air tight seal.
What type of water system - city supplied or private well? That is the foundation of your answer.
Excessive air unsepararted in the supply lines collects at your fixtures. Contact your water supplier about the problem. If you are on a privte well, there are devices which remove this air entrainment. yepper...air in your pipes...Private well?
Air often gets in through badly connected pipe joints.
Any break or leak on the suction side of your pump can cause air in the lines.
natural gas?
Singing water pipes can be caused by air that is trapped in the pipes. The air can cause a whistling or singing sound, or it can cause the pipes to knock or rattle.
Call your city hall or local water company and complain there is air in your water pipes.
You should not have air in your pipes. Call a plumber.
Air can get into pipes for many reasons. If you are on a well system you may be sucking air in from loose connections. On many municipal systems there are numerous leaks and each sucks in some air to the system.
Sometimes it's caused by air in the pipes.
There are 2 ways air can get into water pipes:* Some showers, garden hoses, and other appliances have a relatively long pipe between the valve where the water is turned on and off and the end. When you turn off the water, that pipe slowly drains/evaporates and fills with air. When you turn the water back on, it may take a surprisingly long time for the water to travel from the valve to the end.* All water has small amounts of dissolved air in it. Often that air comes out of the water, forming small bubbles that float up through pipes, collecting in air pockets at the highest ends.
Air accumulates in the water pipes after a water softener cycles because the water softener stops the flow of water during this time. This usually only takes 5 to 7 minutes. Air builds up when the pipes get empty.