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Thread: Vent 5\16?????

  1. #1
    Join Date
    Feb 2017
    Location
    Central Wisconsin
    Posts
    401

    Default Vent 5\16?????

    I run 150-200 foot lines of 5\16, less than 1% slope no vacuum. Should I be venting this line at the first tree or leave it as a closed system? It seems that when I pulled the first top tap last spring that the sap flowed more freely and didn't (vapor lock). Thanks Trapper
    1960 - 1970s 70 taps on galvanized buckets with Dad and Grandpa.
    1970s - 1985 Acted crazy!
    1986 - 2005 20-30 buckets.
    2006- 2017 70 buckets and bags
    2017-2019 100 bags and buckets
    2020 Finally retired!!! 75 buckets, 50-75 on tubing. RO Bucket, New 12 X 16 Shack and a 36X42 flat pan.
    2021-Adding another 125 taps along with a second RO bucket.
    Lots of Family and Friends and a dog named Skyy!

  2. #2
    Join Date
    Apr 2013
    Location
    Northeast Vermont
    Posts
    521

    Default

    leave it closed.
    Awfully thankful for an understanding wife!

    “The only place success comes before work is in the dictionary.”
    - Vincent “Vince” Lombardi

    Good luck to all!

  3. #3
    Join Date
    Mar 2006
    Location
    Lanark, ON
    Posts
    2,269

    Default

    Lots of research has been done on this - keep it closed. Venting to let the sap drain might seem helpful but in the long run it causes the tapholes to heal up faster. The gases the tree produces will help push the sap out of the lines.
    4,600 Taps on vacuum
    9,400 gallons storage
    3 tower CDL RO
    3.5'x14' Lapierre Force 5
    Twitter & Instagram: @ennismaple
    www.ennismaple.com

  4. #4
    Join Date
    Apr 2018
    Location
    NY
    Posts
    11

    Default

    leave it closed! research shows higher yield with a closed system than an open.

  5. #5
    Join Date
    May 2009
    Location
    UVM Proctor Maple Research Center, Underhill Ctr, VT
    Posts
    5,347

    Default

    Quote Originally Posted by Trapper2 View Post
    .... when I pulled the first top tap last spring that the sap flowed more freely...
    Yes, it'll do that. All the sap will run out quickly, then stop. After it all runs out you'll get one drop in, one drop out (or one slug in, one slug of sap out). Over the season however, venting will introduce more microbes into the system and result in considerably LESS sap. There's been several research studies done on this since tubing was introduced....all produced the same results...less sap when you vent.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
    https://mapleresearch.org
    Timothy.Perkins@uvm.edu

  6. #6
    Join Date
    Mar 2005
    Location
    Albion PA
    Posts
    4,984

    Default

    No!
    Regards,
    Chris
    Casbohm Maple and Honey
    600 roadside taps
    3x10 King, WRU, AOF and AUF
    12" SIRO Filter Press.
    2015 Ford F250 PSD sap hauler
    One Golden named Maggie Cat named Lucy
    Too many Cub Cadets
    Ford Jubilee and several Allis WD's, and IH tractors

    www.mapleandhoney.com

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