I have an 8-gallon Polarware brew kettle that I use for heating mash water and boiling. It would be a lot easier for me to do the transfers if it had a valve and hose coming out of the bottom. Could I just drill a hole in the sidewall and insert a brass valve? Can I just use a regular brad-point drill bit? Are there some high-temperature washers/ o-rings that I could use to seal it up watertight?
Having done this recently allow me to offer some wisdom. It will be best if you have a 1/2 high torque drill motor that is variable speed. Cutting fluid is a must. Stainless has a tendency to harden if it heats up, therefore slow speed with cutting fluid is essential. Be it that a kettle is thinner than a keg you might get through it before the the steel tempers if your heat gets out of control. If it glows red you're screwed you'll have to grind out the hole with a die grinder. Ask me how I know this.
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i would suggest you get this kit with and get an extra shim washer. my kit fits a little loose. i got the $4 brass valve and bought a barbed fitting at the local hardware store because i use 3/8" hose and the website only sells 1/2". http://www.bargainfittings.com/index...&product_id=91