I am having an ongoing problem with air in both the cold and hot water lines.  I have a shallow well and have replaced the Air Volume Control on the pump with little result.  I am using a Water Ace Pump Model RTS5. (Serial CCS-12-02).
 
Any suggestions? 
 
Thanks-
Doc Harrison
Jun 4, 2007, 07:54 PM
Air in the water lines comes from one of two problems.  Most of the time the air comes from a leak in the suction line (the line leading to the pump).  I normally replace the check valve ( assuming you don't have a foot valve on the well) with one that will accept a vacuum gauge.  Warning! You will have to re-prime the pump when you do this.  If you have any galvanized fittings on the suction line replace them as well at this time.  After the pump is re-primed, watch the vacuum gauge.  If it draws more than 20", you could have a bad well, which will draw air into the system.