Hi All,
Did not know there was an active Brewie Community here. I bought my B20 from MoreBeer in the insane deal but have been having trouble with efficiency. I have been active on Facebook Brewie Owner's Group and have got some feedback on improving efficiency. Here is all that I tried:
1) Reduced the grain mill gap to 0.8 from 1.2mm (but the have further suggestion to reduce it to 0.3mm - I will try that for next brew)
2) Put grains in two bags instead of one (I further enhanced upon that by keeping them vertical and separating them so recirc goes through the middle of two bags)
3) Watch mash Ph - check after 15 minutes and if not within 5.2/5.4 adjust with acid.
4) Open up the bags and stir the grains occasionally (clearly defeats the purpose of push button system).
Apart from trying 0.3mm - none of the above improved efficiency to desirable numbers (below 60% still) so I did suggest Brewie team to build a malt-pipe about a month back (on facebook and even did some diagrams of the design). But eventually I could not wait any longer and have started my own build of a "Malt-Cage" - this will have solid staggered perforated false-bottom (I got suggestion for what to get from product designer from MoreBeer), four solid (non-perforated) walls, a screen on top, handle to lift to drain, a removable sparge-arm (and while I am at it - I also decided to add a whirlpool arm for the boil tank). I was hoping to get all this under $200 but raw material itself ended up costing $180 (see pictures and details on few of my posts in Facebook Brewie Owners Group). So at this point I am hoping to get this done below $250. Everything is arriving today and I am hoping to get SS welding, lathe work etc. done within 1 week.
Will post updates on progress and results (hopefully good results) here as well.
Cheers guys.
PS: I am in Walnut Creek, CA
Dude- that is great information! Thank you! I am sorry that nothing you did (steps 1-4 above) worked. BUT- thanks for sharing- you saved me a ton of trial & error! I have heard that a finer grind is a must for BIAB systems. I have yet to get a grain mill (although I see on in the not too distant future) but am going to:
#1- Add rice hulls (0.5-1.0 #) in the bag
#2- Add some DME to the boil (Probably 1-2 #. Will crunch the #"s based on the efficiency/gravity pre-boil)
However- please keep us updated on your home-built Malt Cage! I am in Sacramento (formerly Brentwood- still have family out there. Try to visit MoreBeer on detroit as much as I can!) so if you ever plan on selling your project, let me know!