On Mon, 28 Sep 2009 16:02:42 +0100, Dave Liquorice wrote:

On Mon, 28 Sep 2009 08:08:43 -0500, Jules wrote:

... was idly thinking some PVC pipe split down the middle to make the
channels, then glued with normal pipe joint stuff to make them hold
water.

Seems a lot of work. Why not buy it off the shelf complete with
proper water tight joints? It's called guttering...

Yes and no - I don't think guttering joints are designed for continual
submersion, plus as the joints expanded and contracted they might pull
dirt in and then fail. I expect it'd work for a few years, then need some
tinkering with.

'course any moat system still needs clearing from debris, possibly much
more frequently than Andrew's electrical system (where stuff will tend to
blow/fall off, rather than collecting in a trough)