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Thread: Top line size

  1. #1
    Join Date
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    ohio
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    Default Top line size

    Can top (dry) line be different size than bottom (wet) line? For
    Example of I have 1.5 inch on bottom is 1” ok for top line?

  2. #2
    Join Date
    Feb 2016
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    Peru, Maine
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    Default

    Yes but generally your dry line is a larger diameter than your wet line. Might want to check out the Cornell Book on vacuum to make sure you have things sized correctly. Or provide some of the bush info to get opinions from others on what the sizing should be.
    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

  3. #3
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    Jan 2006
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    Oneida NY
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    Default

    I agree, I've seen a few where the top is the same size as the bottom, but in general the top (dry) line is 1 size larger than the bottom (wet) line.
    Dave Klish about 400 taps, down from much more. Retired from collecting and boiling in 2021. Mostly because of a bad hip.
    2012 Mahindra 36 HP 4x4/ loader/cab/heat/AC:-)
    3x8 raised flue evaporator
    250 GPH converted to electric, RO by Ray Gingerich
    6.32 KW solar system, 1.48KW is battery backed up, all net metered
    website: www.cnymaple.com

  4. #4
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    Mar 2014
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    Landaff,NH
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    Default

    Quote Originally Posted by ldick View Post
    Can top (dry) line be different size than bottom (wet) line? For
    Example of I have 1.5 inch on bottom is 1” ok for top line?
    It could be okay, although normally the dry line is larger due to vacuum lose over how long you run it. I would try and map out what you have for lengths and where the taps are, and size accordingly

  5. #5
    Join Date
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    UVM Proctor Maple Research Center, Underhill Ctr, VT
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    Default

    The wet line is often smaller to reduce sap heating in the line. The dry line is often larger to carry more CFM to the pump. The advantage to making them the same size is ease in repairs (less fitting sizes to deal with).
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
    https://mapleresearch.org
    Timothy.Perkins@uvm.edu

  6. #6
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    ohio
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    Default Mainline

    I will have about 1200 ft of mainline. All with less than 1% slope here in flat country. Not exactly sure on number of taps yet but likely between 1500 and 2000.

  7. #7
    Join Date
    Jan 2017
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    Williston, VT
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    Default

    Quote Originally Posted by ldick View Post
    I will have about 1200 ft of mainline. All with less than 1% slope here in flat country. Not exactly sure on number of taps yet but likely between 1500 and 2000.
    Another practical reason to do the smaller pipe as wet line is due to the major sag problems you'll have with a shallow slope. Sag problems can be overwhelming (more freezing problems, longer to thaw, warmer sap when conditions are warm, surging of the flow, et cetera. And of course it looks terrible and unprofessional.

    The more weight - the greater the sag between support posts. Even empty, the 1.5" weighs about 50% more than 1". Full of sap the the weight difference is about 2.5 times greater which means maybe 2.5 times the sag (I'm guessing here since catenary analysis is above my pay grade).

    I'd also recommend not using black tubing. Black tubing will be warmer on sunny days - and guess what? That means even more sag!


    Ken
    Ken & Sherry
    Williston, VT

    2017 - 13 gallons on 65 taps (12 buckets, rest 3/16), 2x4 flat bottom, modified cargo box sugarhouse
    2018 - 90 gallons on 418 taps (gravity lines), Leader 30"x10' Vortex Arch & Max Raised Flue with Rev Syrup Pan, New Sugarhouse
    2019 - Burned through alot more money: heated kitchen, 2x2,000 and 375 gal ss sap tanks, CDL1200 RO, Bauch Vac Pump, More taps, etc., etc., etc.
    https://www.facebook.com/pumpkinhillmaple/

  8. #8
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    ohio
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    We use post every 10-15 ft with high tensile wire set with laser but do still have some issues with flow.
    I’m having trouble deciphering the Cornell vacuum notebook but guessing with our slope issues 1.5 going to be required at least for part of mainline.

  9. #9
    Join Date
    Feb 2016
    Location
    Peru, Maine
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    Default

    Without looking at it I would have guessed 1" or 1.25" for mainline. Is it just 1 mainline, 1200 ft. in length or several short mainlines? How far is it from your pump to the mainlines?
    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

  10. #10
    Join Date
    Jan 2013
    Location
    ohio
    Posts
    101

    Default

    1 mainline. Pump and releaser right at start (less than 10 ft) of line.

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