After the boil is over

[Niall K]

I have noticed while reading Jims Brewing Techniques on all grain brewing, after the boil, it says 'Switch off boiler, Let the wort stand for 20-30 minutes'. Is this necessary? What I have being doing was after the boil, cooling straight away with my cooler to get the temp for pitching the yeast

[louthepoo]

I let mine stand for 20 mins now, i dont know why, a few people on here said to do it, so i did

[oblivious]

I cool it to lock in hop aroma and to stop the production of DMS

[Horden Hillbilly]

I let my brews stand for 30 mins after switching off. It allows the hops to settle in the bottom of the boiler before cooling and running off. The hops then act as a filter in a similar way as the grains in the mash tun do when running off. I always draw off a jugful then return it to the boiler as the first runnings can be murky.

[PieOPah]

Wouldn't the hops settle WHILE cooling?

[Horden Hillbilly]

Wouldn't the hops settle WHILE cooling?

They probably would using a immersion wort cooler, I use a CFC myself, hence the wait. This suits me as I usually soak a small amount of hops for 30 mins when I switch my boiler off.

[prolix]

I turn my immersion cooler on almost straight away cos as POP says the hops settle whilst cooling

[ColinKeb]

i wondered this a while ago , i knew it was to let the hops form a bed but i was using an imersion chiller so thought that they would settle anyway. i tried it with waiting and without and i think to be honest that i got better results by not waiting and going straight into cooling. I think the sudden change helps the cold break, if t cools for half an hour first its not as much as a shock and wont have as much affect. its also a waste of half an hour imo

[mysterio]

I put the immersion chiller on immediately, like oblivious said to lock in hop flavour and aroma, not create DMS, and not extract any more bitterness than i've calculated for.

[noby]

Maybe the type of chiller is causing the confusion. Those with immersion chillers, like myself, have no reason to wait, do we?
I start chilling, and stirring straight away. As the temp drops, for the last ten minutes or so I let the hops etc. settle to the bottom.

[Jim]

As several people have correctly pointed out, when you use an immersion chiller, the hops can settle while you cool.

I use a CFC, so I have to wait for the hops to settle and form a filter bed.

[shiny beast]

Started chilling straight away after reading an article on D.M.S Found the hop aroma wasn't as good so went back to a 20 min' soak. Have not had any noticeable problems with D.M.S .