How to build a cool box mash tun

Discussion in 'Beer Brewing "How-To" Guides' started by HisDudeness, Nov 15, 2015.

Help Support The Homebrew Forum UK by donating:

  1. Jan 21, 2016 #61

    Tony1951

    Tony1951

    Tony1951

    Bungling Amateur

    Joined:
    Mar 31, 2015
    Messages:
    1,084
    Likes Received:
    549
    Location:
    Under a stone @55N
    Neat idea that. There are a million ways to do this stuff. How do you insulate that tun?
     
  2. Jan 21, 2016 #62

    AdrianTrace

    AdrianTrace

    AdrianTrace

    Member

    Joined:
    Jan 28, 2010
    Messages:
    276
    Likes Received:
    69
    Location:
    Botley, Hampshire
    Sorry, that's my boiler - my tun has a sawn copper pipe frame
     
  3. Jan 21, 2016 #63

    Tony1951

    Tony1951

    Tony1951

    Bungling Amateur

    Joined:
    Mar 31, 2015
    Messages:
    1,084
    Likes Received:
    549
    Location:
    Under a stone @55N
    :) I'm embarrassed now. Neat filter though.
     
  4. Feb 2, 2016 #64

    pgl150

    pgl150

    pgl150

    Active Member

    Joined:
    Jan 24, 2016
    Messages:
    45
    Likes Received:
    12
    Location:
    NULL
    Great thread guys. Bits are all on the way!

    Dutto. How did the drilled manifold turn out?

    I experimented with sawing and drilling on a scrap piece of copper last night and i found drilling MUCH easier for me. If its working well I may go down that route.

    Cheers

    Paul
     
  5. Feb 2, 2016 #65

    keat64

    keat64

    keat64

    Landlord.

    Joined:
    Nov 4, 2015
    Messages:
    501
    Likes Received:
    146
    The issue I had with sawing was keeping the pipe rigid without a vice.
    A strategic G-clamp and a 45° fitting pushed on the end to stop the pipe from floating about and it took no more than 5 minutes to saw each piece.
    I put saw marks at 1cm intervals.
     
  6. Feb 2, 2016 #66

    HisDudeness

    HisDudeness

    HisDudeness

    Active Member

    Joined:
    Apr 16, 2015
    Messages:
    94
    Likes Received:
    411
    Drilling should work fine as long as the holes are sufficiently small, I'd suggest 2-2.5mm but hopefully someone who has done this will advise.
     
  7. Feb 2, 2016 #67

    Dutto

    Dutto

    Dutto

    Dutto

    Joined:
    Jan 13, 2016
    Messages:
    6,619
    Likes Received:
    3,388
    Location:
    East Lincolnshire
    Paul,

    I used a 2.5mm drill-bit and only broke one!

    To ensure an even pattern I stuck the bits of pipe in the vice and used the edge of the vice to balance the straight edge to draw a single straight line.

    I then punched starter dents in the pipe along this line at +/- 1cm spacing and drilled the first set of holes.

    I repeated the process for the two other lines of holes and punched/drilled in between the first set of holes.

    For the two "end bits" I just kept cranking the ends in the vice and checking until I could just see daylight through them.

    I also used the vice to crimp in the ends of the elbows and tee-piece so that the assembly wouldt fall apart when it was installed; and it didm't so "Result!"

    It took about five to six litres of lautering before the mash started to run clear and I managed to get the "dead space" down to less than a litre by not passing the end of the pipe underneath the outlet.

    Finally, for sparging I knocked up a sheet of aluminium foil that sat on top of the grain bed and punched dozens of holes in it with a small Phillips screwdriver. It ensured that the spare water fell evenly over the grain bed.

    Check out the photograph above for details.

    Hope this helps. :thumb:

    Ian
     
    HisDudeness likes this.
  8. Feb 3, 2016 #68

    pgl150

    pgl150

    pgl150

    Active Member

    Joined:
    Jan 24, 2016
    Messages:
    45
    Likes Received:
    12
    Location:
    NULL
    Cheers

    I'll take those points on board when I do mine. Bits have all turned up but I will probably have to wait until the weekend to get it done.

    I'll let you know how it goes. :)

    Paul
     
  9. Feb 5, 2016 #69

    keat64

    keat64

    keat64

    Landlord.

    Joined:
    Nov 4, 2015
    Messages:
    501
    Likes Received:
    146
    This is mine.
    The black bit on the end, is a pipe mender 18mm to 14mm reducer.
    The 14mm end fits inside the copper fitting, the 18mm end fits inside a rain water butt tap, which is my mash tun drain tap.
    I normally fit it with slits facing down.

    [​IMG]
     
    Chippy_Tea and Dutto like this.
  10. Feb 28, 2016 #70

    anhtran313

    anhtran313

    anhtran313

    New Member

    Joined:
    Feb 28, 2016
    Messages:
    1
    Likes Received:
    0
    Location:
    Moody
    awesomeeee, this is exactly what i am finding. How detailed your tutorial is. Thank you so much for taking your time making and writing this post.
     
  11. Feb 28, 2016 #71

    mike-os

    mike-os

    mike-os

    Landlord.

    Joined:
    Jun 7, 2015
    Messages:
    570
    Likes Received:
    109
    Location:
    near Wrexham
    Seems a lot of work to me when I can buy a bazooka strainer for a few quid
     
  12. Feb 28, 2016 #72

    JapanBrew

    JapanBrew

    JapanBrew

    Landlord.

    Joined:
    Oct 10, 2015
    Messages:
    1,295
    Likes Received:
    370
    Bazooka strainers are used in the boil kettle to strain out hop residue. Some people do use them to mash but manifolds and large false bottoms do the best. I've used and made lots of different kinds and manifolds and false bottoms are the way to go.
     
  13. Feb 28, 2016 #73

    fanus

    fanus

    fanus

    New Member

    Joined:
    Feb 28, 2016
    Messages:
    1
    Likes Received:
    3
    Location:
    NULL
    Hi all
    When I build my mash turn i did not want to drill through the cooler's side wall. Was scared it would start to leak. So I made this plan.
    It works great. All I do if I want to start the flow is to fill the siphon line with water and let it flow. [​IMG][​IMG]

    Cheers
     
    Notlaw, HisDudeness and Dutto like this.
  14. Feb 28, 2016 #74

    Notlaw

    Notlaw

    Notlaw

    Dubbel Dragon

    Joined:
    Jan 4, 2016
    Messages:
    1,124
    Likes Received:
    80
    Location:
    Garstang, Lancs
    That's a good idea, I like that. This way I an still use the cool box for taking beer on picnics :whistle:
     
    VillageBrew likes this.
  15. Feb 28, 2016 #75

    ManseMasher

    ManseMasher

    ManseMasher

    Regular.

    Joined:
    Nov 29, 2014
    Messages:
    467
    Likes Received:
    340
    If you look at John Palmers' diatribe on mashing, you will see from his diagrams how mashing/sparging works better with multiple arms rather than one central one. I'll try and post a link for you.
     
  16. Feb 28, 2016 #76

    ManseMasher

    ManseMasher

    ManseMasher

    Regular.

    Joined:
    Nov 29, 2014
    Messages:
    467
    Likes Received:
    340
  17. Feb 28, 2016 #77

    mike-os

    mike-os

    mike-os

    Landlord.

    Joined:
    Jun 7, 2015
    Messages:
    570
    Likes Received:
    109
    Location:
    near Wrexham
    for fly sparging i would agree, otherwise i fail to see any advantage... water in, stir, drain , repeat, makes no difference if the bed drains evenly as there is no channelling of " clean" water from the sparge bar through the grist, which is what you need to avoid with fly sparging
     
  18. Feb 28, 2016 #78

    ManseMasher

    ManseMasher

    ManseMasher

    Regular.

    Joined:
    Nov 29, 2014
    Messages:
    467
    Likes Received:
    340
    Not sure. My thoughts would be it doesn't matter how the sparge is done, the wort will still need to drop through the grain. The flow will be the same through the grain bed no matter how it is achieved due to gravity? Therefore the exit points to the tap will be unaffected by the sparging method?
     
  19. Feb 28, 2016 #79

    pgl150

    pgl150

    pgl150

    Active Member

    Joined:
    Jan 24, 2016
    Messages:
    45
    Likes Received:
    12
    Location:
    NULL
    Bought one of these and fitted it to my boiler before I did my first AG brew yesterday. IMO it was money wasted! I should have bought hop bags.

    Spent ages scraping hops off of it so that I got something actually flowing out of the tap! If I didn't do it then it soon became a trickle, if that.

    Can't imagine it would be much better in a mash tun but I'll defer to the experience of those that have used it successfully.

    Just my experience from yesterday that's all. :)
     
    yeastinfection likes this.
  20. Feb 28, 2016 #80

    Dutto

    Dutto

    Dutto

    Dutto

    Joined:
    Jan 13, 2016
    Messages:
    6,619
    Likes Received:
    3,388
    Location:
    East Lincolnshire
    I've used the mash tun three times now. (What an improvement over previous efforts at AG!)

    The first two times I put a layer of tin-foil with large holes punched in it on top of the grain to ensure even distribution and lautered the mash through it until it came clear.

    I then started draining out the wort into the boiler and put a second layer of tin-foil on top with smaller holes punched in it so that the sparge would again be evenly distributed.

    It worked fine so why I changed my system I just don't know! :doh::doh:

    On the last brew I had less grain to be mashed so I lautered without my "tin-foil distribution" system.

    It not only took a lot longer to achieve a clear wort it also resulted in an uneven grain bed that varied from about 3cm to 10cm deep and made proper sparging virtually impossible! :doh: :doh:
     

Share This Page