What are the best fluxes for joining copper tubing and fittings made of?

The best fluxes for joining copper tubing and fittings are made of noncorrosive materials. This is important because noncorrosive fluxes do not damage the copper surfaces or create further corrosion in the plumbing system after the joint has been made. They facilitate the flow of solder into the joint while ensuring that the integrity of the copper is maintained.

Noncorrosive fluxes, such as rosin-based or non-acidic fluxes, are specifically formulated to be effective at lower temperatures and do not leave behind harmful residues that could lead to corrosion over time. This prolongs the life of the plumbing installation and enhances the reliability of the joints.

Corrosive chemicals and acid-based solutions, although effective at cleaning surfaces, can be detrimental to copper fittings, leading to premature failures in the plumbing system. Heat-resistant materials might describe the properties of solder rather than the type of flux, which is meant to facilitate the jointing process rather than resist heat. Therefore, using noncorrosive materials for flux is the ideal choice in ensuring durability and functionality in the plumbing system.