Here's a differing opinion- the BIAB sparge step can indeed be effected with near- boiling water. The aim is to elevate the entire mash to around 75C and that's achieved by adding a few litres of roughly 100C water to many litres of mash at mid- 60C and stirring well. This is particularly so with MaxiBIAB where kettle volume is limited- with that method if using 78C water and enough of it to reach the desired mashout temp, there's probably no way all that sparge liquor would fit in the kettle even if added at the end of the boil (that's not advised BTW). That kind of defeats the purpose of the mashout sparge.
FWIW, I've been using boiling water to sparge my MaxiBIABs for years, not once in club, state and national comps has tannin been fingered as a fault, it seems to be another myth.
Pikey, I'd suggest using the stock/ no- sparge BIAB to begin with, so follow the $30 Stovetop or MiniBIAB methods, alternatively use a bigger kettle and stick with stock BIAB.
Hope that helps! :icon_cheers:
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