BIAB

Postby mark1964 » Sun Feb 25, 2018 20:00

someone please explain how BIAB works with only 1 pot how is mash temp held etc

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Re: BIAB

Postby gregles » Sun Feb 25, 2018 21:17

I wrap up my burco in a sleepimg bag and a couple of big cosy coats and it holds temp for an hour even outside in winter.
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Re: BIAB

Postby mark1964 » Sun Feb 25, 2018 21:20

ill be using a 50 litre pot was thinking of keeping temp in it on the stove

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Re: BIAB

Postby CJV8 » Sun Feb 25, 2018 21:25

I'd be careful about heating the mash directly. You can end up getting hotspots, or you can burn the bag (unless you make a crude false bottom to keep the bag off the bottom).
I never insulated my 50L biab pot and brewing indoors I'd loose maybe 1°C over a 90min mash.

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Re: BIAB

Postby mark1964 » Sun Feb 25, 2018 21:29

so which type of pot are you using? just a normal 50l stainless. Also do you sparge

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Re: BIAB

Postby Jeltz » Sun Feb 25, 2018 22:06

By virtue of using a full volume of water the heat loss is much reduced over a 90 minute mash, wrapped in a duvet, sleeping bag or cylinder lagging jacket you'll find helps. When I did BIAB it was electric, sat on a bit of wall insulation (like kingspan) then I used a lagging jacket and it lost only a few degrees little on an over night mash without any further heating.

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Re: BIAB

Postby Aleman » Sun Feb 25, 2018 23:10

80L thermobox :D ... With an element in the bottom to heat the water before mashing, and to boil the wort once the bag and grain is removed

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Re: BIAB

Postby Rolfster » Mon Feb 26, 2018 00:08

I did a bit of biab with a 50 liter pot. I had it full of grains and water. It held temperature ok with a duvet over it for 90 minutes.
I ended up with about 33 liters of wort into fvs at the end. That did include a small sparge of the grains.
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Re: BIAB

Postby Oldstunty » Mon Feb 26, 2018 09:37

[quote="Jeltz"]By virtue of using a full volume of water the heat loss is much reduced over a 90 minute mash, wrapped in a duvet, sleeping bag or cylinder lagging jacket you'll find helps. When I did BIAB it was electric, sat on a bit of wall insulation (like kingspan) then I used a lagging jacket and it lost only a few degrees little on an over night mash without any further heating.[/quote"]

The method I use for overnight mashing is to stand the BIAB on some kingspan and then wrap it all in a couple of sleeping bags
and a dressing gown( every little helps!). This is all held together with those poundland luggage bungees. Works a treat :thumb:

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Re: BIAB

Postby mark1964 » Mon Feb 26, 2018 20:36

so full volume mash means no sparge then ?

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Re: BIAB

Postby mark1964 » Mon Feb 26, 2018 20:39

so the plan would be either a thermobox or a 50 l pot use the full amount of water for mashing remove bag after mashing time then just boil? Or am i missing something. I had a 3 vessel kit BIAB is new to me sorry

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Re: BIAB

Postby Jeltz » Tue Feb 27, 2018 00:43

mark1964 wrote:so full volume mash means no sparge then ?

I usually kept back a few litres in a bucket and dunked the bag into it to rinse the grains a bit like a batch sparge. partly as it helped efficiency and partly as I could brew a greater volume that way.

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Re: BIAB

Postby Rolfster » Tue Feb 27, 2018 19:41

Jeltz wrote:
mark1964 wrote:so full volume mash means no sparge then ?

I usually kept back a few litres in a bucket and dunked the bag into it to rinse the grains a bit like a batch sparge. partly as it helped efficiency and partly as I could brew a greater volume that way.


+1 for what Jeltz said!
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Re: BIAB

Postby mark1964 » Tue Feb 27, 2018 20:21

Ok thanks ill have to get a 50 l pot

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Re: BIAB

Postby sledgehammer » Wed Feb 28, 2018 21:01

Im wondering if i should go back temporarly to Biab
might be a stop gap untill i can get back into the full 3 vessle setup
but does anybody make a bag big enough for a 9 gallon batch?
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Re: BIAB

Postby Oldstunty » Wed Feb 28, 2018 21:17

sledgehammer wrote:Im wondering if i should go back temporarly to Biab
might be a stop gap untill i can get back into the full 3 vessle setup
but does anybody make a bag big enough for a 9 gallon batch?


Are there any shops near you that sell net curtains, or rolls of voile(I think that's how it's spelt).
I use an off cut of said material, but I wouldn't know how much you'd need for 9 gallons, lots probably!

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Re: BIAB

Postby sledgehammer » Thu Mar 01, 2018 12:12

This sort of stuff?
https://www.minervacrafts.com/shop/fabr ... gJPmfD_BwE
i would have to find somebody to sew it for me too

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Re: BIAB

Postby robwalker » Thu Mar 01, 2018 12:20

With good insulation you shouldn't need to reheat mark, just mash in and leave it. I've mashed overnight with BIAB and only lost 5c with fairly inadequate insulation.
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Re: BIAB

Postby Oldstunty » Thu Mar 01, 2018 17:07

sledgehammer wrote:This sort of stuff?
https://www.minervacrafts.com/shop/fabr ... gJPmfD_BwE
i would have to find somebody to sew it for me too

steve


That's the stuff :thumb:
I just drape mine over the sides of my kettle and push the middle section into the heated water.
No need for sewing that way.

Cheers,
Jon.

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Re: BIAB

Postby sledgehammer » Thu Mar 01, 2018 18:20

good idea
i could cut the center out of a top and use that to clamp it but then i wouldnt have a top to use Doh!
should i go for the 100% cotton or is the mix cotton/poly mix ok to use?
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Re: BIAB

Postby mark1964 » Thu Mar 01, 2018 19:29

I am going to use net curtain i used it before in the 3 vessel set up. Thanks rob ill be isulating with something maybe kingspan in a wooden box

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Re: BIAB

Postby Rolfster » Thu Mar 01, 2018 20:25

I've seen someone on here before who had a belt thingy which they put around the outside of the pot holding their net curtain in place. Would be fairly simple but effective I think!
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Re: BIAB

Postby vacant » Fri Mar 02, 2018 14:46

Bungees around the top hold my net curtain in place when I BIAB

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Re: BIAB

Postby Rolfster » Fri Mar 02, 2018 14:57

vacant wrote:Bungees around the top hold my net curtain in place when I BIAB


That must have been it. Cheers Vacant!
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Re: BIAB

Postby sledgehammer » Fri Mar 02, 2018 19:19

mark1964 wrote:I am going to use net curtain i used it before in the 3 vessel set up. Thanks rob ill be isulating with something maybe kingspan in a wooden box

Don't forget to launder them before you hang them back up or they will take on a brown tea stain colour :rofl:
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