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Thread: Shurflo 4008 vac pump surging in the lines

  1. #11
    Join Date
    Jul 2012
    Location
    Lawrence County Ohio
    Posts
    350

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    I've watched the sap coming in the laterals to my manifold and seen the same thing. Especially in the morning when the trees first thaw and start running. Another thing that compounds this is having laterals with varying amounts of taps and obviously length. Part of the fluid dynamic is the equilibrium finding itself an all of that tubing. Even though some of the laterals have more taps, they may have more space in between each tap. There's constant change inside that system as some of the trees produce more sap and some produce more gas. After an hour or so of the trees running, the equilibrium is pretty much constant, and the surging seems to diminish, until the tress and laterals start to freeze in the evening, you'll see the same thing again. Get the leaks in the tubing and the manifold fixed and like you said, you'll be looking for ways to store/boil more sap!! I've been running four to five shurflo 4008's for five years now, no recirc lines, and this year I let them run 24/7 on days with a good flow forecast. I added another 100 watt panel to each system 300 watts total now, and with the strainer screen in place, you won't have any ice damaging the diaphragms. I bought inkbirds last year and still haven't got them wired up. I haven't had to swap a battery all year with 300 watts running into my 15 amp charge controllers. I had to clean my strainers 2x a day a few wees ago with the 65F days we had back to back. That sure slimes up the lines in a hurry.
    '12 15 jugs - Steam pans
    '17 125 3/16 - 18" x 72" drop flue on homemade arch
    '18 240 3/16 - Deer Run 125
    '19 450 3/16 - Converted RO to electric/added a membrane
    '20 600 3/16 - Maple Pro 2x6 Raised Flue, added AOF/AUF
    '21 570 3/16 - Built steam hood, Smoky Lake filter press
    '22 800 3/16 - Upgraded RO to 4 4x40
    '23 500 3/16 - Re-plumbed RO, new "Guzzler"
    '24 500 3/16 - Steam Away, DIY 8x40 RO

  2. #12
    Join Date
    Apr 2011
    Location
    Putnam County, Ohio
    Posts
    379

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    As a first timer with a 4008 and 5/16 lines this is great to hear of other's experiences. There was one day this year I have been able to get 15" vacuum at the manifold and that's it. I changed the strainer fitting and retaped that fitting this last week - I thought I was on to something. Not much difference. I do see surging as well but for the most part the sap and bubbles all seem to come in the right direction. Due to the lay of my woods, even though some lines are over my head in the low spots and I have tapped high in the tree at the far end of the line, I have almost no slope. I believe this is why I lose half of my vacuum and get no sap without the recirculation line open. What can I improve for next year?

    1. Use a star fitting instead of the 1/2" SS manifold - too many possibilities for leaks.
    2. I have 2 75 watt solar panels. It's not enough. I started today with 13.3 volts after being too cold to run yesterday. The sun shone all day while the pump ran and when I shut it off it read 11.7 volts.
    Earlier this season, I would come out to see the pump not running and the temperature sensor not working either. I thought a connection might be bad but now I think the charge controller shut it off
    for getting too low

    The system has continued to put sap in the tank. It is just a pilot project this year. Of the 13 taps, only one of the trees has had a bucket on it before. One big silver maple I couldn't get anything to speak of out of it with buckets before so I don't have much history to compare the trees to. All the sugars are 10-11", so no big gushers there.

    The vacuum stays right around 12-13" and the surging is minimal as long as I keep my 3/16 recirculation line end down in the sap and keep it restricted with a c-clamp inside the pump box.
    RC Maple

    14X14 sugarhouse - new for 2012
    RO Bucket - RB10 - New for 2019
    2x3 barrel evaporator with continuous flow pan
    55 taps - most on buckets
    This is next year!

  3. #13
    Join Date
    Mar 2013
    Location
    West Windsor Vt
    Posts
    23

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    Recently purchased a sap guzzler 401n and not having any luck finding a strainer or filter to put in before pump. Any leads or ideas, I am in Vt. Thanks

  4. #14
    Join Date
    Nov 2013
    Location
    Princeton, MA
    Posts
    495

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    Quote Originally Posted by holbrook hill farm View Post
    Recently purchased a sap guzzler 401n and not having any luck finding a strainer or filter to put in before pump. Any leads or ideas, I am in Vt. Thanks
    Try US Plastics. They have several different types.
    https://www.usplastic.com/search/?keyword=T-Strainer
    Mountain Maple farm
    2022 NAMSC award winning dark amber syrup
    2023: 320 taps, 70% red maples. Mountain Maple S4 diaphragm pump controller with automated sap transfer and text messaging
    Website:
    https://www.mountainmaplefarm.com
    https://www.facebook.com/MountainMapleFarm/

  5. #15
    Join Date
    Mar 2012
    Location
    Walpole, NH
    Posts
    1,370

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    Quote Originally Posted by holbrook hill farm View Post
    Recently purchased a sap guzzler 401n and not having any luck finding a strainer or filter to put in before pump. Any leads or ideas, I am in Vt. Thanks
    Tractor Supply sells them in their sprayer parts section. They carry them in 3/4”,1”, 1-1/2” pipe threads. Also, many online vendors sell them like Amazon and companies that sell sprayer parts.
    https://www.tractorsupply.com/tsc/pr...s-steel-screen
    Sugaring for 45+ years
    New Sugarhouse 14'x32'
    New to Me Algier 2'x8' wood fired evaporator
    2022 added a used RB25 RO Bucket
    250 mostly Sugar Maples, 15% Soft Maples. Currently,(110on 3/16" and 125 on Shurflo 4008 vacuum, 15 gravity), (16,000 before being disabled)
    1947 Farmall H and Wagon with gathering tank
    2012 Kubota with forks to move wood around

  6. #16
    Join Date
    Mar 2013
    Location
    West Windsor Vt
    Posts
    23

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    Thanks, Amazon took care of things this morning.

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