In the early stages, the symptoms of ALS -- also called Lou Gehrig's disease -- include: 1  Increasing weakness in one limb, especially in a hand. 2  Difficulty walking. 3  Clumsiness of the hands. 4  Fasciculations, which are subtle, light twitches under the skin.  Impaired speech.
The Safe Drinking Water Act (SDWA) Section 1417(a)(1) required that after June 19, 1986 only lead free pipe, solder or flux could be used in the installation or repair of any plumbing in residential or non-residential facility providing water for human consumption, which is connected to a Public Water System.
Because lead is very durable and resists corrosion and has a smooth inner surface and can with stand higher pressures then other materials of the time as lead has various wall â¦ thicknesses depending on the actual working pressures Lead was used for water pipes because it is very durable and resists corrosion.