(July 14, 2019 at 3:26 am)Anomalocaris Wrote:I see what you mean.(July 14, 2019 at 2:51 am)onlinebiker Wrote: Maple sap is usually about 2 % sugar - but it does the same with water.
The pipe is a Silicon based semi rigid tubing made specifically for syrup use. It will withstand 100 psi and does not collapse with 25 inches of mercury vacuum
How would air in the line prevent flow?
If that were the case a sink would not drain when you pulled the plug.....
Not just air in the hose, but an actual air trap. That’s where somewhere along it’s path the hose bows upwards to form a hump. If the top of the hump is higher than the top of the liquid level in the tank, You have an air trap. If you apply suction to the end of the hose, you drop the pressure of the air in the air trap. This imbalances the pressure of the air in the tank and pressure of the air in the hose, and the air pressure in the tank will force the liquid up over the hump, then siphoning effect will take hold and the tank will drain.
If you top up the tank until the liquid level in the tank is higher than the hump in the hose, then the hydrostatic pressure of the water will overcome the air in tthe hump and the tank will drain naturally.
But no - the line out of the tank is level with the tank exit - till it goes through the exterior of the barn, then goes down. At no point is the line higher than the exit of the tank.
