Bonding Water Heater Pipes

[SAS]

I have a gas hot water heater which has copper piping connected to the water heater, but the rest of the house plumbing is cpvc. Currently there is a bonding wire connecting the copper cold water inlet pipe and the copper hot water outlet pipe. Since the plumbing transitions to cpvc for both the cold and hot water directly above the water heater, does this bonding serve any purpose?

I ask partly because I installed a recirculation pump in the hot water line between the hot water heater and the bonding clamp. The pump has plastic parts that break the continuity of the copper, so if there is any point in having the bonding wire, I should move it below the pump. But that only is worth doing if there is actually some value in having the hot and cold lines bonded just before and just after the hot water heater, even though there is no connectivity to anything else after the transition to cpvc directly above the water heater.

 

[Fitter30]

Heater going to be grounded from the gas line. You can take that wire off the two nipples.

 

[Sponsor]

 

[bigb56]

The only reason for that jumper is to bond the hot since the cold is bonded at the service. It was either installed when your house had continuous metal piping, or if it never had continuous metallic piping it was installed in error. The purpose of bonding is to clear a fault if a pipe becomes energized so you don't get shocked which can't happen with a non-metallic system.