I would need an accurate, complete and succinct summary of all brewing equipment, measurements taken and nuances of the brew day. I know you’re looking for a precise answer but I can’t give you one simply because I would need the bigger picture and then perhaps question some inane minute detail of each step.
If you really left a gallon of liquid in your mash tun - simply tilt your mash tun to get it out! Seems to work for me, but I have the red model. [/quote]
Mines blue…there’s the issue.
i do tilt mine. This is just mind boggling to me that 1 gallon of water could be missing. I could swear there wasn’t that much liquid when I was cleaning it out. I’ve tested it before without grain and tilting and the dead space was less than half a gallon of water left.
I’m not looking for precise answers just a couple of ideas of what it could be. I can either check into those or eliminate them as possibilities. Problem solving 101.