Originally Posted by AnOldUR
So, the real question (at least in my mind) here is, "Will a sight glass on my MLT tell me if my grain bed is compacted?"
I would think not. A compacted bed would not change the amount or level of fluid in the tun. Maybe someone using a pump and who has a sight glass on their MLT can answer better.
In my experience, that is exactly what happened. I used to have a sightglass on my first MLT that I had on my HERMS. The liquid in it would disappear- and that's when I knew the grainbed was compacted. I hated that thing, by the way! It was only handy when filling it, but even as dumb as I am, I could see from the HLT's sightglass when 7 gallons is gone from it and so into the MLT.
Originally Posted by Brad2287
A sight glass on the MLT can have some value for those who fly sparge. It allows you to make sure your water level has not changed with a quick glance indicating water input equals wort output. With that said i do not have a sight glass on mine. For me the detriments outweigh the advantages.
That to me is the only advantage- if I"m filling my BK, and water is coming out of the HLT into the MLT, if the water level is the same, then I know it's set up ok.
When I went with my current MLT, I skipped the sightglass because it really wasn't very useful and was one more thing to avoid when trying to clean it out.