Air Trapped In Hot Water Lines
There s also the possibility that air could be trapped in both the hot and cold water lines in which case you may need different treatments.
Air trapped in hot water lines. Air usually gets trapped at high points in your water supply system and to force this out you have to temporarily increase the velocity of the water flowing through the pipes. There are three potential causes of air in your hot water lines. Simply running your taps for a while can solve this issue. Air that is entering or is trapped inside a water supply line may interfere with the uniform pressure and flow of water.
If you suspect the check valve you should get it diagnosed and replaced immediately. Air in the hot water line only if you ve checked your cold water feed and everything seems to be working fine then the issue generally points towards your water heater. When this happens there are several things to try and consider in order to fix the problem. A faulty check valve can be potentially serious as it permits contaminant into the water supply.