2 tankless gas water heaters

[Bama_Electrical]

Working on a remodel and the customer will have 2 gas tankless water heaters (1 on each side of the house). I know the AHJ will want the gas bonded at both water heaters. Any issues with having hot, cold and gas bonded together in 2 different places?

 

[LarryFine]

The gas line is normally bonded on the incoming (source) side of any CSST, and only once.

The appliance EGCs take care of any bonding of the appliance ends.

 

[Bama_Electrical]

The customer just ran all new copper water pipe through the attic, so that is why I have to bond it.

 

[curt swartz]

You need to bond the copper piping at a single location. The is no requirement to install a bond to the hot water pipes or the gas lines. The hot piping gets bonded to the cold piping at the mixer valves. Steel gas piping gets bonded by the EGC of the appliance that could energize the piping.

As Larry mentioned if the gas piping is CCST you may have to install a single bond to the grounding electrode system depending which type of CSST is used.