[HayZee518]

basically what this means is if any of your water lines are of PEX or plastic, then your water system is NOT GROUNDED! the same is true if your house is piped with genova plastic pipe then the fixtures are not grounded and if unintentionally energized by an electrical current, using these fixtures can potentionally kill you if conditions are right. so if you have a piece of PEX in the middle of a run of copper tubing the you'll need to apply a grounding clamp on each piece of the copper tubing and jumpering each clamp with a piece of #8 bare stranded copper wire to continue the bonding.