Gear for BIAB Double Batches

Post #1 made 15 years ago
Hi All,

Up until now I have been having great success with my little BIAB set-up (40L aluminum pot, 4 ring burner, bag and a couple of 20L cubes), my next step is to go into double batches, one for me and one for a mate who digs my beer.

What I had in mind was the following -

90L aluminum pot from allquip
2 X biab bags from craftbrewer
1 ball valve
2:1 pulley system
Same old 4 ring burner
A couple more 20L cubes

I am a bit worried about the bags bursting so I thought that maybe double bagging it would be the way to go? What do you think of the rest of the set up?
Would resting the setup on a few cinder blocks be ok? Up until now I just mashed/ boiled on the garage floor then picked the pot up to drain into the cubes.

Cheers

Post #2 made 15 years ago
Have you read about maxi BIAB DK1?

You could easily do double batches with the equipment you already have.

Personally, I would not double bag. If the stitching is good on the bag you have, the material will take the weight easily.

If you choose to buy more equipment, you list looks good. The only thing on there you don't need is the ball valve.
Last edited by hashie on 11 Apr 2011, 10:56, edited 5 times in total.
"It's beer Jim, but not as we know it."

Post #4 made 15 years ago
Hi DK1,

I do double batches fairly easily in a 50L pot.

I've hoisted 12KG of wet grain using a 2:1 pulley in a single layer voile bag no problems

I would suggest a 70L pot would be a good upgrade, and in fact, I'm lusting after a 98L pot so I can do triples and quads :)

Your 4 burner is probably fine, and if not, just get a high pressure variable regulator for it
Fermenting: -
Cubed: -
Stirplate: -
On Tap: NS Summer Ale III (WY1272), Landlord III (WY1469), Fighter's 70/- II (WY1272), Roast Porter (WY1028), Cider, Soda
Next: Munich Helles III

5/7/12

Post #6 made 15 years ago
Hi there dk,

I have two 70L Allquip pots and mostly do double batches. I have to use a little top up water after the mash but all works really well. I have the SS pots and they are pretty heavy. Your ally ones will be a far more comfortable weight.

My pot diameter is 45 cm. Yours will be 50 cm so evaporation is going to be very high (over 20%) if you do a single batch in this pot. Double batch evaporation rate in the 70L works out nicely at around 11%. With the 90L, you might want to float a bowl on your wort during the boil to reduce the evaporation rate a bit.

BIAB bags made of the right material and sewn well will take a massive amount of weight. Don't double bag. I am worried about you using two bags that are probably not of the right size. You really need a pulley and one well-made bag that completely lines your kettle to make life easy. Mind you, I have seen one guy use two bags for very large batches and he has no problems apart from it being a bit more awkward to manage.

Good on you dk. Will look forward to seeing some pics down the track.

:peace:
PP
If you have found the above or anything else of value on BIABrewer.info, consider supporting us by getting some BIPs!
    • SVA Brewer With Over 100 Brews From Australia

Post #7 made 15 years ago
Thanks PP, I am giving the maxi-biab a go this weekend, (gillards parental leave has not been paid yet .... still) I am stoked to find the calc that stux did, it's a life saver!
We shall see how it turns out.

Cheers
Post Reply

Return to “Bags, Mashers, Thermometers, Kettles etc.”

Brewers Online

Brewers browsing this forum: No members and 21 guests