Position for Drainage and Initiate Siphon

What happens here

Once the hose is filled with water and one end is securely submerged in the hot tub, take the other end of the hose and lower it to a position significantly below the hot tub's current water level. The video shows the hose end placed on the ground, directing the water flow onto a landscaped area. Water will immediately begin to flow out of the hose due to the siphoning action, continuously draining the hot tub as long as the submerged end remains underwater and the discharge end stays lower.

Goal: Create a sufficient elevation difference to initiate and maintain the siphoning action.