Auxiliary Air Valve Test
- Remove auxiliary air valve. Fully close adjustment screw. Immerse air valve bulb in boiling water and observe valve head through the side port. Valve should move smoothly to closed position.
- Blow through the side port. No air should pass through valve. Allow valve bulb to cool. The valve head should move smoothly back to open the main air passage. Replace air valve, if valve does not operate correctly. Reset adjusting screw before reinstalling valve.