When a house is plumbed with copper, the bonding connection between the gas piping and the water piping is typically located near the water heater where the two lines are in close proximity. According to our electrical code, any item such as valves, filters, or a meter which could compromise the continuity of the water line upstream of the gas pipe bonding location must have jumper around it. I never see these jumpers and I wonder if I am just misunderstanding the code.
Here is the wording:
10-902 Grounding conductor connection to water pipe electrodes
(1) Where the grounding electrode is a metal water-piping system to which a common grounding conductor or the grounding conductor of a system is attached, the point of attachment shall be
(a)on the street side of the water meter; or
(b) on a cold-water pipe of adequate ampacity and as near as practicable to the point of entrance of the water service in the building.
(2) Where practicable, the point of attachment shall be accessible.
(3)The metal cold-water system shall be made electrically continuous from the point of attachment of the grounding conductor to the water service entrance by bonding together all parts that contain insulating sections or that may become disconnected at such locations as meters, valves, and unions.