Tinning Flux is particularly useful to solder low- or no-lead brass effectively. Generally, lead brass conducts heat better than metals used today. However, most older, lead-piping systems have been eliminated because research has shown that lead in water pipes can harm the human body through repeated exposure. The Environmental Protection Agency determined that drinking water's maximum lead-contaminant level should be zero due to its toxicity.
Soldering low lead brass can be daunting since it doesn't conduct heat well. Using tinning flux will help eliminate the human error of soldering low-lead brass and help fill the joint to create a leak-free connection.
