The way i do it is put my thumb over the hose end, and fill the vaccum part with tank water. Then I lift up my thumb so the water pours down into the tube (make sure the hose is held below the tank in the bucket) then replace your thumb back over before the tube completely drains. (thus, filling the tube with water) Then, keeping your thumb in place, lower the vaccum back into the tank and let all the air out. Remove the thumb, and presto. It has started. This is so quick ad simple it takes SECONDS to do.