Relocated water service bonding...

[SSE]

Come across something I've not seen before. Basically from what I can gather a mains water stop cock & sink has at some point been moved to a different location in a kitchen. What we have is main water pipe (copper or similar) entering building at old stop cock location & there is a 10mm earth clamped to it, the plumber has then used a white plastic pipe to supply the feed to the new stop cock & sink location but this joins to copper under kickboards so that everything you see under sink is copper. Outwith the sink once they go under kick boards it turns back to plastic, the hot pipe included. They also have a 10mm earth clamped underneath sink between hot & cold copper pipes. Surely this isn't the correct way of doing it?

 

[Des 56]

What are we trying to achieve when we connect a bonding cable to a service ?
Why does the location of the sink have any bearing on the above?

 

[telectrix]

leave existing bond in situ. test other copper pipes to see if they are extraneous. ( > 2.2K ohms to METmeans they are not and don't require bonding ).

 

[Pete999]

leave existing bond in situ. test other copper pipes to see if they are extraneous. ( > 2.2K ohms to METmeans they are not and don't require bonding ).

As per