I wouldn't. Star-san is a MUCH better choice. I've been learning to make wine and a lotta the wine guys use star-san now too.
__________________ Malkore
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10
I haven't seen this recommended any where but can you sanitize your beer equipment with potassium metabisulphite?
As the others have said, it's not recommended. You can get away with sulphite products in some aspects of winemaking but you will want something else for brewing beer. Iodine based solutions like Iodophor and Star-San are your best bets.
No sulphite is not a decent sanitizer for beer - OK for wine.
Mainly because wine is a difficult environment for bacteria to begin with but also because the sulphite action is complemented by the acid environment in wine - not so in beer.
potassium metabisulphite
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