On Tue, 31 Aug 2004 22:48:19 +0100, tony sayer wrote:

Depending on where you are just 12" down will do for all but
the hardest of winters (not likely).

So why do the water lot insist on 30 inches?....

Because if we ever got another winter like '47 or '63 or possibly the
early 80's, pipes 12" down would freeze. A week of daytime maxes below
zero and nighttime lows of -10C and 12" would be rather shallow. There
is also the element of protection from man with pick axe digging a
hole.

--
Cheers
Dave. pam is missing e-mail