> Hi all,
> We have a mystery pipe here which we really need to locate. It is an
> unused 2" electric svs pipe (grey) that goes from our panel inside the
> house to "somewhere" outside. It goes under slab and is at least 50
> feet long, as we put a snake down it and ran out of snake! We assume
> it exits somewhere logical for a planned extension, but short of
> digging down 2ft deep all the way round the house there appears to be
> no way to locate it. The builder is long gone..weve tried tapping with
> a mallet on the slab and listening, tapping on the pipe inside.. were
> at a loss..
>
> Any tricks here? We could really use this if it is found to be
> accessible..
>
> Any help appreciated.
>
> G
>

Long shot- Connect a carry tank of compressed air to it. If the exit end isn't very securely sealed off, you may be able to hear the thing whistle.

If it acts like it's not tightly sealed, but still can't hear anything, inject Mercaptan or other odorant into the compressed air stream and go sniff for it.

Jim