My lower chamber is full, but when I open the spigot no water comes out of it. Why?

Climate, elevation and other factors can create a tighter fit, preventing air flow between chambers, which slows down or prevents water flow (a natural phenomenon known as vapor lock). To prevent vapor lock, create air flow by placing a vapor lock clip on edge of lower chamber, making sure that the long portion of the airlock clip is hanging inside of the lower chamber.

All systems may not include a vapor lock clip. If you experience vapor lock, please contact our Customer Service department to obtain a clip.