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After the type of vacuum system has been selected, tubing layout is the next step. This process may be accompanied by assistance from experienced tubing distributors, foresters, or Extension Educators.
The first step in tubing layout is to flag the proposed mainline locations in the sugarbush. Take into consideration the number and location of tappable sugar maples and the topography of the site. Mainlines may be located in a natural depression to facilitate sap flow from the lateral lines or run parallel with the slope of the sugarbush. Any brush or conifers that create shade or interfere with the mainline should be removed at this time.
Mainline should be supported every 50 feet by
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a tree or a support post. Ground lines are not recommended as they will be covered with snow, freeze quickly, and thaw more slowly. Maintenance of ground mainlines during the season is also more difficult and complete drainage is not guaranteed due to natural dips and low spots on the forest floor.
Using a hand level, flag the support trees at the point that indicates the grade and location of the mainline. Mainlines should maintain a slope of at least three to five percent to insure complete drainage after every sap flow. A hand level is essential to maintain proper slope percent on hilly ground or flat terrain. On flat ground, a three percent slope is achieved by raising the end of the
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