Check Valve
Remove check valve from air manifold. Blow air into valve from air pump side and manifold side. If check valve is working properly, air should pass only from air pump side. A small amount of air leakage is acceptable.
Remove check valve from air manifold. Blow air into valve from air pump side and manifold side. If check valve is working properly, air should pass only from air pump side. A small amount of air leakage is acceptable.