Leaded Solder
In 2015, the use of leaded solder caused Lead-in-drink Water Incident. There are different brands and origins of solders; the most suitable solder for soldering copper water pipes is lead-free solder. Using leaded solder to solder the copper pipes of drinking water will cause the lead content of drinking water to be exceed the safety drinking standards. The long-term drinking will damage the body, especially the liver and brain. Therefore, users should pay special attention to whether the plumber uses lead-free solder and qualified pipes and fittings.