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Thread: Dry line or not

  1. #1
    Join Date
    Feb 2016
    Location
    Cape Vincent NY
    Posts
    37

    Default Dry line or not

    I am setting up a woods that has about 2% slope and will have approximately 1500 taps. I have actually 2 questions. The first is, is a dry line necessary if I over size the main lines? If I use 1 1/4 inch for the mainline instead of 1" and 1" branches off the main will this work? There will be 3 mains with the longest being about a 1000 feet with 500 total taps on that one. The others are similar but shorter. I am estimating a total of about 6000 feet of mains and branches.

    The second question is do I add up all of the distances to calculate the CFM drop to the system or do I take the longest mainline distance for CFM drop. Again the will be three mainlines and about 34 lateral branches off of the main lines. Thanks for any help on this.
    Scott Knapp
    5x14 Pellet Evaporator
    1700 Taps 2019
    3/16 Gravity
    5/16 Vacuum
    Northern NY (Canadian border north)
    sknapp6978@gmail.com
    https://www.facebook.com/Knapps-Sapp...0168377726255/

  2. #2
    Join Date
    Jan 2012
    Location
    Norwich NY
    Posts
    390

    Default

    If 2% slope is the best you have, you would benefit from a wet/dry system.
    Neil

  3. #3
    Join Date
    Mar 2017
    Location
    Vermont
    Posts
    256

    Default

    Absolutely run a dry line. I have 1500 taps on my 1.25 over 1.25 system and several times during a good run that wet line was full and would have reduced vacuum in the woods if not for the dry line.
    2016- 50 buckets. Made 4 gallons
    2017- 100 buckets, 50 taps on 3/4 mainline and 3/16th tubing + shurflo vacuum. Made 30 gallons.
    2018- 1000 taps on 3/16 + vacuum, 60 buckets - made 378 gallons of syrup.
    2019- 1713 taps on 3/16 + vacuum, NO buckets. Made 500 gallons.
    2020- 2793 taps made 1118 gallons.
    2021- adding 500?

  4. #4
    Join Date
    Jan 2006
    Location
    Oneida NY
    Posts
    10,934

    Default

    You need to realize, with a mainline on a 2% slope you have a very small allowance for a sag before the vacuum to the rest of the system is extremely compromised. A dry line is of great assistance in that case. If 1500 taps, I'd suggest a 1.25" wet line and a 1.5" dry line, however some would use 1" wet/1.25" dry.
    Dave Klish about 400 taps, down from much more. Will hold about the same for 2021
    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

  5. #5
    Join Date
    Feb 2016
    Location
    Cape Vincent NY
    Posts
    37

    Default

    I just walked part of the woods. Most of the taps are going to be closer to the lowest point. I think what makes sense now is to go with 1" mains and 1 1/4" dry line just to carry more cfm to the outer most taps. It does appear that it is more like 3% slope. The second question still is do I add up all the linear feet of main line and wet line to get the cfm loss or just the longest distance from the vacuum pump.
    Scott Knapp
    5x14 Pellet Evaporator
    1700 Taps 2019
    3/16 Gravity
    5/16 Vacuum
    Northern NY (Canadian border north)
    sknapp6978@gmail.com
    https://www.facebook.com/Knapps-Sapp...0168377726255/

  6. #6
    Join Date
    May 2002
    Location
    Cabot Vermont
    Posts
    451

    Default

    If it were me, I would do 1.25 wet and 1.5 dry conductor system. Why do all the work to find out you short changed your self. In the end it will pay for it's self. I hate to do things twice and its only going to be about 200.00 dollars difference.
    Blaisdell's Maple Farm

  7. #7
    Join Date
    Mar 2017
    Location
    Vermont
    Posts
    256

    Default

    Brian makes a great point.
    2016- 50 buckets. Made 4 gallons
    2017- 100 buckets, 50 taps on 3/4 mainline and 3/16th tubing + shurflo vacuum. Made 30 gallons.
    2018- 1000 taps on 3/16 + vacuum, 60 buckets - made 378 gallons of syrup.
    2019- 1713 taps on 3/16 + vacuum, NO buckets. Made 500 gallons.
    2020- 2793 taps made 1118 gallons.
    2021- adding 500?

  8. #8
    Join Date
    May 2010
    Location
    Highgate, Vermont
    Posts
    49

    Default

    I think your on the path. I run most of my setups of 1200-1500 taps on a wet dry system with 1.25 wet and dry lines with excellent results. I would look for a nice electric releaser and a 2-3 hp vacuum pump. Also Philp Widrick lives in black falls and would show you a nice setup on a wet/dry system.
    Highgate
    30,000 plus Taps
    Wood Chip Evaporator
    TapTrack System- Wireless vacuum monitoring

  9. #9
    Join Date
    Nov 2010
    Location
    Barnet, VT
    Posts
    2,499

    Default

    Agree with most of what has been said. I will add that many times I have seen sap coming down the dry line early in the day from a frozen spot in the wet line. But you’re still getting the sap.
    William
    900 taps plus 1200 purchased sap
    3 X 12 Thor pans on a Brian design arch
    1986 Seprotech 900 RO

  10. #10
    Join Date
    Feb 2016
    Location
    Cape Vincent NY
    Posts
    37

    Default

    Well it looks like you guys are right on the sizing. The CFM at 1000 feet jumps from 8 in the 1" to 13 in the 1.25 ". That being said would you make all the wet line even the laterals off the main the 1.25"? If I go from 1.25" to 1" on the branches off the main it may reduce some cost, but if its better to keep it all the same it may make sense to do it with 1.25" mains for all of it. Any thoughts?
    Scott Knapp
    5x14 Pellet Evaporator
    1700 Taps 2019
    3/16 Gravity
    5/16 Vacuum
    Northern NY (Canadian border north)
    sknapp6978@gmail.com
    https://www.facebook.com/Knapps-Sapp...0168377726255/

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