• Thoroughly clean the O-ring (replace it if needed [1]. Make sure that the O-ring is correctly seated in its
designated groove [2].
5.2.4. Assembly and Testing for Leaks
• Reassemble the air valve in reverse order of paragraphs 5.2.3 and 5.2.2.
• Slowly open the isolating valve located on the riser under the air valve.
• Look for leaks in the Outlet Discharge Elbow.
• If the air valve still leaks, proceed to Second Stage Maintenance