How can you get water from the crown of a siphon?

Install an inline canister at the bend and the siphon can draw water through it to an elevation above the water source. Stop the siphon flow with a shutoff valve and empty a small amount of the water from the canister and then close it back airtight. When the siphon flow valve is opened the weight of the water in the long leg of the siphon can draw the air out and once the line is purged, the canister is ready to be emptied again. AUTOSIPHON (R) company has designed one valve which can do this.