On 24 Jul 2005 07:13:13 -0700, wrote:

They do not exist, it is a simple fiction designed to limit the use to
the high but not infinite level of supply.

I'm glad someone else sees it that way.

Most houses are unmetered. Put simply if unmetered customers use less
water then the water companies make higher profits.

Threaten unmetered customers with a meter and they soon cut down their
water useage.

sponix