+ Reply to Thread
Results 1 to 9 of 9

Thread: Sucking air from inside tree?

  1. #1
    Join Date
    Mar 2013
    Location
    West Sumner, ME
    Posts
    223

    Default Sucking air from inside tree?

    Has anyone ever run into this? I couldn't build any vacuum so I started checking my lines. Changed a few tees but nothing changed. Finally got a few pairs of vice grips to isolate parts of my line and tracked a leak back to a single tap. Changed the tee, dropline and tap and still leaking. Using the clear CVs I was able to see air bubbles being pulled into the tap. So Im guessing there is a hollow spot in this tree and Im sucking air from inside the tree. 27" of vacuum with this line pinched off, little to no vacuum with it open.
    West Sumner Sugar House
    West Sumner, ME
    400 +/- Taps - 2 x 8 CDL Venturi - 2 Shurflo Solar Systems - MES Dolly 300
    https://www.facebook.com/WestSumnerSugarHouse

  2. #2
    Join Date
    Feb 2010
    Location
    Leeds County,Ontario,Canada
    Posts
    988

    Default

    Could be a hollow spot,or close to an old taphole that is allowing air to your new tap
    7th generation maple producer in sugarhouse built in 1892
    2x World Champion Maple Syrup Producer
    1250 taps on cv adapters
    Leader Vortex 3x14 with Max Flue and Revolution Syrup Pan,Enhanced Steam Away
    www.leggettmaplesyrup.com

  3. #3
    Join Date
    Mar 2018
    Location
    Worcester County, MA
    Posts
    52

    Default

    I had an experience similar to yours this season with an older red maple. It didn't look like the healthiest tree (as evidenced from it not healing very well from prior taps, though the crown looked fine) but we tapped into clean white wood and the spout seated well, but once the sap started running it was pretty clear there was a leak in the line. After changing the tee we ended up pulling the tap and putting a line connector in and that restored the vacuum. What caused the problem? I don't know. The spout, drop line, tee, and lateral were all good.

  4. #4
    Join Date
    May 2009
    Location
    UVM Proctor Maple Research Center, Underhill Ctr, VT
    Posts
    5,579

    Default

    Either the tree had a crack, was hollow inside, or you tapped too close to an open taphole. It happens.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
    https://mapleresearch.org
    Timothy.Perkins@uvm.edu

  5. #5
    Join Date
    Mar 2009
    Location
    milton ontario
    Posts
    132

    Default

    Here is a video of a hollow tree we tapped a few years ago
    https://youtu.be/MOomFBeKI8c

    Nick
    3x12 Grimm
    1400 on vacuum
    woodmizer LT40HD25
    6 little sap haulers
    Facebook

  6. #6
    Join Date
    Mar 2013
    Location
    West Sumner, ME
    Posts
    223

    Default

    Its always something. This is only the 3rd year on this tree and I know Im not near another hole. Must just be a hollow spot. Oh well, plugged it off this this year.
    West Sumner Sugar House
    West Sumner, ME
    400 +/- Taps - 2 x 8 CDL Venturi - 2 Shurflo Solar Systems - MES Dolly 300
    https://www.facebook.com/WestSumnerSugarHouse

  7. #7
    Join Date
    Dec 2002
    Location
    Loudon NH
    Posts
    5,722

    Default

    I tap a lot of reds and this happens more than you would think. So far this year I've found 4 in my 600 give or take reds. Now that the trees are getting thawed out I won't be surprised if I find more.
    Russ

    "Red Roof Maples" Where the term "boiling soda" was first introduced to the maple producing world!

    Algier 2x6 evaporator, W F Mason arch
    Lapierre 250 Turbo RO machine
    SP-22 vacuum pump
    1930 Ford Model AA Doodlebug tractor
    1971 IH 454 52hp diesel tractor
    A couple of Honda 4 wheelers
    About a dozen chainsaws and no chickens

  8. #8
    Join Date
    May 2009
    Location
    UVM Proctor Maple Research Center, Underhill Ctr, VT
    Posts
    5,579

    Default

    Quote Originally Posted by West Sumner Sugar View Post
    Must just be a hollow spot. Oh well, plugged it off this this year.
    This happens. We've already done a lot of work looking at the loss of sap yield from tapping into stained wood. While tapping this year, the crew flagged spouts where brown wood was hit so they could keep an eye on them. There were 43 taps across 5,452 taps where brown wood was hit (about a 0.8% stain hit rate, which is very good). Of those 43, 9 taps (so far) have been found to be leaking and required correction or removal (pull spout and cap). So brown wood costs both in terms of reduced sap yield and ALSO leaks which reduce vacuum and require time to track down and fix later.

    https://www.youtube.com/watch?v=RxeuNtUZQ5A
    Last edited by DrTimPerkins; 03-11-2021 at 07:58 AM.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
    https://mapleresearch.org
    Timothy.Perkins@uvm.edu

  9. #9
    Join Date
    Feb 2016
    Location
    Peru, Maine
    Posts
    782

    Default

    Great video Dr. Tim, thanks for sharing.
    270 taps on 2 Shurflo's, 31 taps on 3/16" and 120 taps on gravity. 421 total for 2021 season.
    Mountain Maple S3 controller for 145 of the vacuum taps
    2x6 Darveau Mystique Oil Fired Evaporator w/ Smoky Lake Simplicity Auto Draw
    Wesfab 7” filter press
    IBC totes in the woods, 800 Gallon CDL bulk tank at the shack

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts