Originally Posted by Arrheinous
The markings on my 6.5 gal brewing buckets are spot-on. I use these to collect wort during lautering and today I collected 3 gallons of first runnings and then two sparges of 2 gallons. So that's 7 gallons total and I've calibrated the markings on the buckets with warm water.
So let me get this straight. You mash, lauter, then run off 3.5 gallons into the kettle, as in you get 3.5 gallons per the sight glass. You then sparge twice with 2 gallons each time. Barring large absorption during sparging (which shouldn't be an issue), you should have 7.5 gallons, but read 6? And you measure each water addition with the bucket(s), which you believe to be correct. Do I have this right?
If so, what are your readings after each sparge? If not, what are you doing differently?