Buy a 45 Gallon Brew Kettle (Direct Fire) | Quality Beer Brewing Equipment | Stout Tanks and Kettles
Weldless Flex Sightglass
Weldless Sight Glass - 16"
Amazon.com: Sight Glass with Adapter-1/2"NPT High Temp Silicone Washers, Quartz Tube Homebrew Kettle Keg Sight Gauge, Directly Replace Old or Damaged Parts (Size : 16 inch) : Home & Kitchen
Polycarbonate Sight Glass - 23.5 in. | MoreBeer
TC Sight Glass | Spike Brewing
Pot to Boil Kettle or HLT Kit - 3 Port: Drain, Sightglass and Thermometer
40 Gallon Hot Liquor Tank (with Sight Glass) | Stout Tanks & Kettles Brew Equipment