Hard rolling boil & bitterness

[antiphile]

Mmmmmm. Kettle caramelisation!

But you bring up a good point about gas usage. These days I normally start with about 55 litres of wort (in a 60 litre pot) and do, usually, 90 min boils. Using a 4 ring burner, I consider I've done pretty well if I get 2 brews out of a 9 kg gas bottle (but that includes heating up the HLT etc). Out of interest, is that about normal for other people too?

 

[rockeye84]

Rockeye84,
Why do you need to keep topping up the boil?
If you know what your boil off rate is, put that into your brewing program and sparge until you get your pre boil volume.
If you've got the boil off rate right, you should have pretty close to your required post boil volume at the end of the boil.
If your kettle is too small for your batch I can understand topping up, but if it's big enough I'm interested in the reason for topping up.

Well usually doing a 65l batch my calculated pre boil is 70l, most literature points to the fact that over sparging is a no go. Tannins astringently etc etc blah blah.. Lol

Last batch I stopped sparging @ 50l in kettle, runnings were around 1.008/9 when I stopped sparging.

Just topped the kettle up to 70l and started my boil.

Why waste time slowly sparging when I've already juiced the grain bed & tun for all its worth. Got roughly 90% mash eff too.

Unfortunately kettle top up is unavoidable in my situation.

 

[rockeye84]

Nah no real gunk on the elements. As stated prior I might just need to dial down the set temp on my pid from 100 to 98/99 for a bit softer boil.

 

[motman]

Mmmmmm. Kettle caramelisation!

But you bring up a good point about gas usage. These days I normally start with about 55 litres of wort (in a 60 litre pot) and do, usually, 90 min boils. Using a 4 ring burner, I consider I've done pretty well if I get 2 brews out of a 9 kg gas bottle (but that includes heating up the HLT etc). Out of interest, is that about normal for other people too?

Yep, 40 lt into fermenter I get about two brews from a 9kg bottle.. Maybe a bit less. I have a 4 ring burner too, with a couple of the jets slightly enlarged.

 

[Mr B]

NASA burner, 50l batch BIAB, 60 min boil inc heating strike water = about 2kg of gas.

I get a boil going, but not sure you need to go nuts.

Are you going nuts Antiphile?

 

[n87]

50L knockout
Spiral burner
3-4 batches and bbqing

 

[Coodgee]

NASA burner, 50l batch BIAB, 60 min boil inc heating strike water = about 2kg of gas.

I get a boil going, but not sure you need to go nuts.

Are you going nuts Antiphile?

I'm going to guess yes. He sounds a bit nutty