How high is too high to tap a tree on lines?

[DrTimPerkins]

... whatever pressure is lost in the tree by moving the tap up the trunk will be gained in the tube by that same amount of sap pressure there. This assumes 3/16 lines that keep the sap in them.

Correct, but then you need to subtract frictional losses through the fittings and lines. 1 ft of sap theoretically equals 0.88 in Hg. In practice, it's usually less than that.

[DrTimPerkins]

... Dr Tim will point out that I lost sap potential.

No problem tapping up high if you need to do that to collect sap from certain trees or areas. It can alleviate the need to use sap ladders in some cases. Yes, the yield will be lower, but acceptable if this is the only way to do it or if the cost of doing it another way is prohibitive.

[johnallin]

No problem tapping up high if you need to do that to collect sap from certain trees or areas. It can alleviate the need to use sap ladders in some cases. Yes, the yield will be lower, but acceptable if this is the only way to do it or if the cost of doing it another way is prohibitive.

You can solve all the above with a Clear Press. Let the season begin…<grin>

[Pdiamond]

John, I think your clear press must be able to solve all kinds of problems. hehe