▁time ▁steam ▁power ▁was ▁available , ▁but ▁not ▁electric ity . ▁Power ing ▁a ▁single ▁large ▁p ump ing ▁step ▁was ▁practical , ▁but ▁multiple ▁small ▁p umps ▁around ▁a ▁building ▁would ▁be ▁much ▁less ▁so . ▁ ▁The ▁buildings ▁of ▁a ▁tower ▁bre wer y ▁are ▁arranged ▁as ▁a ▁tower ▁with ▁around ▁six ▁flo ors . ▁There ▁may ▁be ▁a ▁single ▁tower , ▁but ▁many ▁bre wer ies ▁were ▁less ▁regular , ▁with ▁port ions ▁reaching ▁varying ▁height s . ▁Only ▁relatively ▁small ▁areas ▁were ▁needed ▁for ▁the ▁highest ▁flo ors . ▁The ▁highest ▁point ▁would ▁be ▁a ▁small ▁water ▁tower , ▁the ▁next ▁highest ▁a ▁prominent ▁vent il ated ▁att ic ▁giving ▁good ▁air flow ▁for ▁cool ers . ▁ ▁B rew ing ▁process ▁▁ ▁The ▁bre wing ▁process ▁compr ises ▁many ▁stages , ▁each ▁taking ▁place ▁in ▁their ▁own ▁special ised ▁vessels . ▁Multiple ▁bre ws ▁may ▁be ▁in ▁progress ▁simultaneously , ▁a ▁new ▁bre w ▁being ▁m ashed ▁and ▁bo iled ▁most ▁days , ▁then ▁allowed ▁to ▁fer ment ▁for ▁a ▁week ▁in ▁one ▁of ▁several ▁sets ▁of ▁fer ment ing ▁t uns . ▁ ▁B rew ing ▁begins ▁at ▁the ▁top ▁of ▁the ▁tower . ▁Water ▁is ▁p ump ed ▁up ▁to ▁the ▁' c old ▁liqu or ' ▁storage ▁tank ▁( 5 th ▁floor ), ▁liqu or ▁being ▁the ▁term ▁for ▁the ▁water ▁that ▁will ▁become ▁be er . ▁The ▁quality ▁of ▁this ▁water ▁is ▁extremely ▁important ▁in ▁bre wing , ▁often ▁cont rolling ▁the ▁location ▁of