Fresh Water Gauge

If I remember my elementary science, a piece of hose spliced vertically into my water line should show the water level in the tank. This bit of hose, T-couplers, and  several hose clamps costing less than $10 will eliminate that empty feeling in my stomach when the faucets start blowing air.  In the picture, the water tank is to the right with tank outlet below and air vent line above. The tank is nearly full now, so I'll be monitoring the water line in the clear hose over the next couple weeks