I am a perplexed brewer. I keep reading about how full volume mash in the one kettle is the true BIAB method and I just don't get it. I can't do this because I a have a small set-up, but if I could get a bigger kettle I'd like to understand how it works. My confusion stems from the mash-water ratio. If this is 2 litres to 1 kilogram, surely full volume is way too loose a mash. I understand that sparging fills this gap. But, in true BIAB, there is no sparge apparently. My next brew has 2.2kg of MO and 4 litres of water for mash and 6 litres for boil. Currently, I sparge in 2 litres to get to boil volume. I am unusual in that I water down my wort post cooling to get my target volume in the fermenter (my pot/kettle is 7 litres max). For normal brewers though doing full volume isn't the mash too loose? I must be missing something simple. Would appreciate someone providing the missing link so I can link the dots up.