Collected volumes are correct according to the batch sparge calculator...Bigbud78 wrote:I'd look at your volumes as well, I've found an extra litre of water pre boil is a drop of about 2 gravity points.
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Collected volumes are correct according to the batch sparge calculator...Bigbud78 wrote:I'd look at your volumes as well, I've found an extra litre of water pre boil is a drop of about 2 gravity points.
No. 19 Litres - Graham Wheeler’s Brew Your Own British Ale.vacant wrote:Is the recipe in US gallons?
It might help, although if it does not show it in the recipe i suppose you have nothing to compare it to. It was just i had a few problems with hitting the correct OG to start with and someone sugested taking lots of readings along the way including volume and temperature to see at what point the problem occured.FutureBrewer wrote: ↑Wed Oct 04, 2017 2:49 pmNo - recipe book is Graham Wheeler’s Brew Your Own British Real Ale. It lists OG, mash schedule, boil time, final gravity, alcohol content, bitterness units and colour.chefgage wrote:Does it give an expected pre boil gravity reading in the recipe book or have you taken any pre boil gravity readings
I’ve never taken a pre boil gravity reading... I batch sparge and (back in the day) would generally hit my target...
Is this something I should be doing as a matter of course..?
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Ah, I get ya. I’ll record these readings on my next brewday for reference.chefgage wrote:It might help, although if it does not show it in the recipe i suppose you have nothing to compare it to. It was just i had a few problems with hitting the correct OG to start with and someone sugested taking lots of readings along the way including volume and temperature to see at what point the problem occured.FutureBrewer wrote: ↑Wed Oct 04, 2017 2:49 pmNo - recipe book is Graham Wheeler’s Brew Your Own British Real Ale. It lists OG, mash schedule, boil time, final gravity, alcohol content, bitterness units and colour.chefgage wrote:Does it give an expected pre boil gravity reading in the recipe book or have you taken any pre boil gravity readings
I’ve never taken a pre boil gravity reading... I batch sparge and (back in the day) would generally hit my target...
Is this something I should be doing as a matter of course..?
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In my case it was not stirring after batch sparging before taking a pre-boil gravity reading (it was the pre-boil figure i was concerned with). And then a combination of incorrect volume calculations based on the beersmith software i was using.
Are you relying on the markings on the side of your vessel such as what is stamped on plastic fermenters. I have found these to be off by quite a bit.
Nope - topping up is just the batch water... mash, top up, drain, 2nd batch, drain.chefgage wrote:Another point. You mention top up water. Is this topping up the fermenter after transfering from the boil kettle. If so are you making sure you stir in the topped up water before taking a gravity reading.
It's definitely a base I'd want to cover. That and the suggestion you take a pre-boil gravity and check all your calibrations, volumes, mash thermometer, etc etc.FutureBrewer wrote: ↑Wed Oct 04, 2017 2:06 pmHmmm - should I just give it a go with water straight from the tap instead of the filtered..?MTW wrote:Filtered water. Low calcium?
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Yes, I haveJambo wrote:Long shot but have you moved house since you were last brewing (different water)?
Righto. Keeping it simple just got complicatedMTW wrote:It's definitely a base I'd want to cover. That and the suggestion you take a pre-boil gravity and check all your calibrations, volumes, mash thermometer, etc etc.FutureBrewer wrote: ↑Wed Oct 04, 2017 2:06 pmHmmm - should I just give it a go with water straight from the tap instead of the filtered..?MTW wrote:Filtered water. Low calcium?
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Aye - my reckoning would be it’s something I’m doing wrong. I’ll dig out all of my notes from past brews and see if I’m deluding myself..! It won’t be the first timeguypettigrew wrote:It's not going to be anything complicated like your water profile. Why? Well, because it won't be! Not to be that far off your intended OG anyway.
This really sounds like a sparge problem, assuming your mash regime is as good as you say.
You always used to batch sparge and you got better extraction. Think hard, really hard, about how you used to do it. Did you stir the mash? How long did you leave it before running off the second and third worts? How much did you drain the mash before adding the new sparge liquor? And, perhaps crucially, how fast was your run off?
Guy
This strikes me as somewhat dismissive of what could be a potentially significant change to the biggest ingredient, water. I get your point but still think it's worth investigating further.guypettigrew wrote:It's not going to be anything complicated like your water profile. Why? Well, because it won't be!
Agreed, jonnymorris, my comment was rather an over generalisation. But, as the OP is losing 10 gravity points each brew, the reason is much more likely to be a flaw in the process somewhere. The water may contribute, but not much.jonnymorris wrote: ↑Sat Oct 07, 2017 8:52 amThis strikes me as somewhat dismissive of what could be a potentially significant change to the biggest ingredient, water. I get your point but still think it's worth investigating further.guypettigrew wrote:It's not going to be anything complicated like your water profile. Why? Well, because it won't be!
How far have you moved, across town or to another part of the country?