Check Valve
Remove check valve from air manifold. Blow air into valve from both sides. Air should only pass through from air pump side of valve. If air passes through from manifold side of valve, replace valve. A small amount of leakage is normal.
Remove check valve from air manifold. Blow air into valve from both sides. Air should only pass through from air pump side of valve. If air passes through from manifold side of valve, replace valve. A small amount of leakage is normal.