Think of the word convert as meaning change, whether it is a person who adopts a new belief, or a changing action, such as when you convert dollars into euros. Many times we can catch a word's meaning by looking at its origins. In this case, the Latin con means around, while vertere means turn..
Maple sap runs best when it freezes at night (e.g. in the high 20-degrees Farenheit range) and then warms up above freezing the next day (in the range of 40-degrees Farenheit and hotter). If it stays warm at night and warm during the day or if it freezes at night but barely goes above freezing the next day, sap does not flow as well or hardly at all.
A leak-free system substantially increase the volume of sap collected. The benefits of increased sap flow in artificial vacuum systems are found throughout the season, but are best realized during poor sap flow days. Artificial vacuum systems do not pull or suck maple sap from the taphole; The process is more complex.Sap flow is generally initiated as temperatures rise above freezing. along with an associated increase in sap pressure within the tree. leak-free system substantially increase the volume of sap collected. The benefits of increased sap flow in artificial vacuum systems are found throughout the season, but are best realized during poor sap flow days. Artificial vacuum systems do not pull or suck maple sap from the taphole; The process is more complex.