Section 1678 - Prohibition on use of lead pipes, solder, and flux(a) No person shall use any pipe, solder, or flux in the installation or repair of any public water system, or in any plumbing providing drinking water that is connected to a public water system, unless it is lead free.(b) For purposes of this section, the term "lead free" means:(1) solders and flux containing not more than 0.2 percent lead;(2) pipes and pipe fittings containing not more than 8.0 percent lead.(c) Each public water system shall identify and provide notice in the manner required by the Secretary by rule to persons that may be affected by lead contamination of their drinking water where such contamination results from the following:(1) the lead content in the construction materials of the public water system; or(2) corrosivity of the public water source sufficient to cause leaching of lead.(d) This section shall not apply to leaded joints necessary for the repair of cast iron pipes.