Bonding metal water piping systems

[pfd]

How do you bond a domestic drinking water piping system that consists of gasketed clamps between the 10' sections of copper pipe throughout the entire building ? Do the gasketed clamps need to be listed for bonding ?
NEC article 250.104 (A)

 

[petersonra]

Re: Bonding metal water piping systems

My guess is you cannot effectively do so unless you do it before they close up the walls. One way would be to install jumpers across each one of the little beasties, like you would do across a water meter.

maybe you could convince the AHJ that you only need to bond those that are accessable.

[ December 01, 2004, 02:51 PM: Message edited by: petersonra ]

 

[sandsnow]

Re: Bonding metal water piping systems

Victaulic makes clamps for grooved pipe that are UL listed for bonding. Contact the manufacturer for info on their clamps. Is the inspector questioning it? If so ask him for a correction to motivate the manufacturer

 

[hurk27]

Re: Bonding metal water piping systems

Would one bolt with a "paint removing star washer" be sufficient? I can't see a special jumper when the bolt's holding the connection together could serve the same mean's?

 

[petersonra]

Re: Bonding metal water piping systems

are the clamps painted?

 

[hurk27]

Re: Bonding metal water piping systems

I was thinking again.

When I read that they had a gasket I was thinking of a flange connection with bolts.