What Causes Air in Water Lines?

Answer

Air in your water lines can sometimes be caused by a check valve installed on the water heater supply line. It can also occur in plumbing systems supplied by a well pump wherein the pump is not installed deep enough in the well, allowing some air to be sucked in the pipes.
1 Additional Answer
The main cause of air in water lines is leakage and pressure. For instance, when a lot of water is put through a line that was previously empty, the water pushes the air either from leakage already existing in the line to the exit causing a bubbling effect at the exit point.
Q&A Related to "What Causes Air in Water Lines"
It's probably because the jet pump could be sucking air form the holding tank. If the holding tank is not full enough your jet pump creates a vortex in the tank.
http://answers.ask.com/Home/Other/what_causes_air_...
When air finds its way into your water well system, it normally isn't from a leak in the line where water spews out. In that case, the force of the water's outflow usually won't allow
http://www.ehow.com/info_11373207_causes-air-lines...
Usually the well pump sucking air in with water due to low water levels.
http://wiki.answers.com/Q/What_causes_air_to_get_i...
This is a tricky question, there is a lot that could be happening. If you know for sure that the air is coming from your city supply then it could be due to maintenance being done
http://answers.yahoo.com/question/index?qid=201009...
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It's probably because the jet pump could be sucking air form the holding tank. If the holding tank is not full enough your jet pump creates a vortex in the tank. ...
It's probably because the jet pump could be sucking air form the holding tank. If the holding tank is not full enough your jet pump creates a vortex in the tank. ...
It's probably because the jet pump could be sucking air form the holding tank. If the holding tank is not full enough your jet pump creates a vortex in the tank. ...
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