I need to solder some copper tubing that will be used in food preparation. I have of course silver/lead-free solder, but I understand that I might need/want water soluble flux or another type of food-grade flux.
How do I ensure that I can sweat these tubes and not contaminate the fluid with flux?
I would like to use a food-quality flux
I would like to be able to clean the flux
On another web site I saw someone mention acid-washing or acid cleaning.
What should I be doing to ensure my fluid is contaminant-free?