No you are not earthed by the water, not in my experience at any rate.
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"TimW" wrote in message
...
There was an ancient (1950s) steel pipe bringing mains water into my house
under the front room and then up in the cup'd under the stairs. There
there was a stop cock and it went into copper pipe and onto the copper a
large sleeved earth wire was connected with a tag on saying "Do Not
Remove".

The steel pipe was leaking so I have taken it all out and replaced with
blue plastic pipe. Was looking at the earth arrangement and wondering if I
need to earth the wiring in another way, into the ground or something, or
are we still earthed through the water in the plastic pipe out to the
outside world?

TW