Great modification to Brewzilla
"Finally, a sight glass that works. I tried the polycarbonate ones (two) and both cracked after a couple of brews. I didn’t want to risk losing a batch so I went back to the original stainless one. So far this one has performed fine. Luckily I kept the fittings from the polycarbonate ones and they worked perfectly with this one so I didn’t need to buy any additional fittings."