Building a cold smoker out of SS irrigation filter

Discussion in 'Smoker Builds' started by dragos28, Sep 25, 2013.

  1. dragos28

    dragos28 Newbie

    Hello Folks,

    I just procured a sweet little SS irrigation filter that I would like to convert into a cold smoker.

    first order of business is getting the legs straightened out.

    First thought is just to put some come-alongs on there, anchor them to the metal patio posts and just pull them out... but i'm wondering if i'll need to apply any heat to them as not to cause any damage.....

    next, I will have to decide on where to cut an opening... my thought is to cut from leg to leg where the LAKOS logo is, about that entire area from the bottom an inch above the bottom weld to an inch above the top weld, inside there is a lip about an inch on either side where it was welded, so i think it would be a great position.

    next plan, is either to weld a band on the "door" or on the inside of the vessel to keep the door from falling through... since i'll be cutting there will be about 1/8th of an inch of loss... + or -

    or maybe make two doors that open outwards instead of one large door that comes off......

    next I will have to fab up some railing system to accomodate two racks, one lower and one higher.....

    then i'd like to find maybe an old keg, as i understand that they are also made from SS... some from aluminum, but i'll have to look for a SS one... to build a fire box... or maybe see if i can find something easier to convert into a fire box.

    i'd like to place the fire box at a minimum of 10' away.. but i'm not sure, hopefully someone who has experience in this can chime in,

    will 10' allow the smoke to cool down enough or should I go further with the fire box?

    that's kind of what ive got in my head, please feel free to shoot me some ideas and criticism.
  2. dragos28

    dragos28 Newbie

    Did some work on my smoker today

    Still need to.cut out the other door, build some racks..
    Last edited: Sep 25, 2013
  3. c farmer

    c farmer Smoking Guru Staff Member Moderator OTBS Member SMF Premier Member

    WOW looks nice so far.
  4. dragos28

    dragos28 Newbie

    Will this size grating work for my smoker? My dad says the holes are too small

  5. daveomak

    daveomak Smoking Guru OTBS Member SMF Premier Member

    That screen is perfect for a cold smoker......    Have you thought about revolving/rotating racks......   That would be cool....

  6. dragos28

    dragos28 Newbie

    Thanks Dave,

    I have some food grade shelving that I will cut up & use.

    the plan is to put it on heavy duty drawer-pulls so that I can pull the rack out, well... like a drawer :D

    I'll post some pics of my progress
  7. dragos28

    dragos28 Newbie

    More progress

  8. dragos28

    dragos28 Newbie

    Got some progress done today

    Almost done... just a few details and then i need to mount it, get the firebox set up & the ducting... hopefully i can have her buttoned up this sunday.
  9. dragos28

    dragos28 Newbie

    Pretty much ready for some meat

    did a trial run with some charcoal and some dry branches just to see how she smokes..

    Should there be any concern with using the galvanized ducting?
  10. dirtsailor2003

    dirtsailor2003 Smoking Guru OTBS Member

    Cool smoker you built there! Flying saucer! I wouldn't use galvanized from the firebox to the smoker.
  11. daveomak

    daveomak Smoking Guru OTBS Member SMF Premier Member

    Very nice set up..... That should work well......  Dave
  12. dragos28

    dragos28 Newbie

    Can you please explain why?

    I also am concerned that maybe if the galvanized gets too hot it may contaminate the meat.... 

    is that possible??
  13. dirtsailor2003

    dirtsailor2003 Smoking Guru OTBS Member

    Yes that is correct, the galvanized metal can give off toxic fumes and contaminate whatever you are smoking.
  14. dragos28

    dragos28 Newbie

    Now, if i'm not actually making a fire, but just smoldering wood chips then there really shouldn't be any concern correct???
  15. dirtsailor2003

    dirtsailor2003 Smoking Guru OTBS Member

    Smoldering chips still make a good amount of heat. I would error on the side of caution myself. You could use aluminum dryer duct.
  16. dragos28

    dragos28 Newbie

    How far out should i replace the galvanized??

    from the firepit there is 8' and a 90degree and another 2.5'

    itd be nice if i can go the whole way in SS pipe :D

    lol but that's overkill to my wallet!
  17. dragos28

    dragos28 Newbie


    just checked, 10' of SS 5" pipe is $900!!!!!
  18. daveomak

    daveomak Smoking Guru OTBS Member SMF Premier Member

    Dragos, morning.....   Replacing the first 5 feet or so, to eliminate the chance of a "high heat" zone, would do....  Use black stove pipe... or steel pipe...   Since you are only cold smoking the rest of the pipe shouldn't be a problem.....   Zinc coated pipe is used regularly on gas hat water tanks...  Since we are talking food here.... all precautions should be taken...   Grainger says the galvanized exhaust pipe is rated 4-500 degrees so you do have a safety margin....    In the event, you have a temp problem, and you see discoloration in the pipe....  I would throw out the food, replace the bad section and more, and start again....    You might find the first time you through out any food, that would have paid for extra length of non-zine pipe...  Just saying... Prevention is worth a pound of cure....     Dave

    Gas Vent Pipe, Diameter 4 In., Length 5 ft., End Type Snaplock Coupling, High Temperature Degrees 400 to 550 Degrees F

    For a metal, zinc has relatively low melting (419.5 °C, 787.1 F) and boiling points (907 °C)
  19. dirtsailor2003

    dirtsailor2003 Smoking Guru OTBS Member

    3"-5" Stainless single wall is $5-$7 a foot. So that would set you back $50-$70 dollars is you really want to go stainless. If you happen to be near the ocean go look at marine supply stores that sell Dickinson marine stoves. Or google stainless marine stove pipe. Otherwise as Dave said Black stove pipe will work too.
  20. dragos28

    dragos28 Newbie

    Think i'm going to replace it all... and just write it off as a learning experience..

    i dont want to take any chances of harming myself or my family..

    i'll search the metal yards and see what some 4" steel pipe will run me... it doesn't need to be SS nor does it need to be 5"... since the inlet at the bottom of the "vessel" is only 4 id 4.5" od

    i'm going to see what i can find... and what it'll cost me....

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