What did you use for the connection inside the cooler?So, does anybody have any neat ideas for permanently marking capacity in the inside of one of these?
I Sharpied markings on mine (well, I did the lines, my wife did the numbers upside down.... much better fine motor control than me...). Pic below.
After the first usage, the red lines faded almost completely, and the black lines show that they'll only last a few mashes.
Any ideas? I am using a transfer pump to get liquid in to the tun, so having a scale directly on it was quite helpful...
 Verbing weirds language
Are you talking about the host connection to the cooler?What did you use for the connection inside the cooler?
I have a similar design of mash tun.
If I were looking to do markings, I think I'd find a piece of plastic (like a long ruler, perhaps), mark it, and just use it as a dip stick. That way it could be easily cleaned, the markings could be etched into it, and I might use a rubber suction cup to stick it on the side of the mash tun.
Cheapest option is a cheat stick. An untreated piece of wood with volume markings
You could maybe use an elbow and tee and add a sight glass
I wish I'd thought of this because it's a great idea. a metal ruler with a key written on it or since it's a mash tun, the back of your "charismatic" mash paddle would be great. The only other thing I could think of was branding/scratching it into the walls but that didn't seem like a good idea because of the potential for bacteria to grow there.
NO!Just buy a short piece of galvanized pipe at HD. Mark it with a file or grinder.
Or you could use etching with a battery. There are several posts on here tub homemade etching directions.
Don't use anything galvanized EVER that will come in contact with food or beverage. This is horrible advice. Sorry to be so blunt, but galvanized coating is toxic! The levels of zinc on it is through the roof.