I want to build a drip-style coffee maker for fun. My "design" features a sealable cylindrical housing for the water and heating element. Silicon tubes will carry boiling water from the cylinder to the coffee grounds. I plan on using a cheap water heater element that I can power using a 120V household outlet. A valve will be installed on the side of the cylinder to allow steam to escape. By partially closing the valve, I think I can modulate how quickly boiling water is pushed through the silicone tubing to the coffee grounds.
What material can I use for the cylinder? Right now I'm looking for easy and cheap. I have access to a drill press and welding station, but not a mill/lathe.
Options that I'm considering:
- 3D printing using a food-grade filament. Not a great option. It seems there aren't a lot of good filaments that can withstand boiling water for long periods of time.
- CPVC piping. I think this would work, but I'm seeing mixed answers online. A few answers say CPVC is rated for 200 F, not 212 F. Another resource rated CPVC for much higher temperatures.
- Copper tubing. This would be safe, but it's an expensive option. And I guess I would need to worry about welding/threading the top and bottom.