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Thread: Dry hopping in uni tanks

  1. #1
    Join Date
    Nov 2018
    Location
    UK
    Posts
    2

    Question Dry hopping in uni tanks

    I have a question regarding dry hopping in conicals used as unitanks. When we go high on the dry hop, above the racking port, then we sometimes have an issue with hops being pulled through when packaging (mostly an issue when canning).

    I chill the beer down, put a bit of head pressure on the tank then dump from the bottom outlet, I get a load out but still have the problem at packaging. What I think is happening is that the hops are all being drawn from the centre of the cone and the stuff on the sides of the cone are stuck on. i.e. the trub level does not lower uniformly with a flat top. When we rack off, the liquid level coming down and being pulled to the central racking point must knock off some hops stuck to the sides (which is above the racking point) and pulls them through. To further support this theory I have noticed that the slower we rack off the less that comes through.

    I have read a few different methods for dry hopping in unis and seen suggestions of dumping smaller amounts but more times, a long slow dump over several hours, dumping using a smaller diameter line.

    Anyone have any views of experiences on this?

    Also, on a side note if anyone has a quick method of getting the dry hops back out again after racking for cleaning I would be interested to hear. Currently I fit a Y piece to the bottom outlet, pump water in one side then drain the other side. Works but takes a bit of time.

    Using T90s btw.

    Cheers.

  2. #2
    Join Date
    Sep 2012
    Location
    Moorhead, Minnesota
    Posts
    572
    We use unitanks as well, and package cans off them, we've noticed similar things as you are experiencing. What helped for us is just dumping less out of the tank more often. Less channeling happens, and you are able to get more out of the tank as the slurry and hops fall down on itself. We usually start dumping hops out after a few days contact time, and leave a hose hooked up throughout the day and come back to it maybe 6-8 times throughout the day, and do this for at least a couple days.
    Another thought I had, is maybe the small amount of hop flakes being pulled though are coming from inside your racking arm. we've had this issue before, leading us to believe it was pulling what was left on the sides of the tank but it was actually debris stuck to the sides of the racking arm. Our solution was to keg off a keg before running cans- filling the keg quickly to dislodge any hop flakes. The keg has room for some sediment to settle out, in cans its a little less desirable.

    Quote Originally Posted by adamkse View Post
    I have a question regarding dry hopping in conicals used as unitanks. When we go high on the dry hop, above the racking port, then we sometimes have an issue with hops being pulled through when packaging (mostly an issue when canning).

    I chill the beer down, put a bit of head pressure on the tank then dump from the bottom outlet, I get a load out but still have the problem at packaging. What I think is happening is that the hops are all being drawn from the centre of the cone and the stuff on the sides of the cone are stuck on. i.e. the trub level does not lower uniformly with a flat top. When we rack off, the liquid level coming down and being pulled to the central racking point must knock off some hops stuck to the sides (which is above the racking point) and pulls them through. To further support this theory I have noticed that the slower we rack off the less that comes through.

    I have read a few different methods for dry hopping in unis and seen suggestions of dumping smaller amounts but more times, a long slow dump over several hours, dumping using a smaller diameter line.

    Anyone have any views of experiences on this?

    Also, on a side note if anyone has a quick method of getting the dry hops back out again after racking for cleaning I would be interested to hear. Currently I fit a Y piece to the bottom outlet, pump water in one side then drain the other side. Works but takes a bit of time.

    Using T90s btw.

    Cheers.

  3. #3
    Join Date
    Nov 2018
    Location
    UK
    Posts
    2
    Thanks for the reply.

    I do a few quick blasts out the racking arm to clear it and last time I did 2 kegs first to try and solve the problem with little luck ☹️

    I will try the shorter more frequent dumps next time time at the very least.

  4. #4
    Join Date
    Dec 2013
    Location
    Colorado
    Posts
    248
    It’s not great but what helped us is the multiple slow dumps before kegging. Also set up a screen on your kegging manifold to catch any large hop particulate.

    I go “90 - 1.5” sight -tc screen (facing inside 1.5” sight) - 1” sight - kegging”. Works to separate some of that and the extra sight allows you to see the beer after.


    Sent from my iPhone using Tapatalk

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