(1) As used in this section, "lead free" means either of the following:

    (a) Solder and flux containing not more than 0.2% lead.

    (b) Pipe and pipe fittings containing not more than 8% lead.

    (2) Beginning on the effective date of this section, pipes, pipe fittings, solder, or flux which are used in the installation or repair of a plumbing system in a building or structure providing water for human consumption or a public water system shall be lead free.

    (3) This section shall not apply to leaded joints necessary for the repair of cast iron pipes.