PrecisionMachinisT wrote:
.....

A pressure reducing regulator on the utility mains upstream from a
residential neighborhood might cause the above to occur--if you had a
pressure guage on the line you would see line pressure changing from
a high to a low reading on a frequency dependant on total volume of
inflow feeding the entire neighborhood.......however, this is
unrelated to the whopper water bill mentioned above......

Well, if the meter is reading a small quantity flow and only reads one
direction if the pressure is changing, each increase in pressure would mean
some flow past the meter and each reduction would mean a reverse flow. I
don't think meters are generally sensitive enough to pick up that amount of
flow, but I could see how it might under just the right situation.


--
Joseph E. Meehan

26 + 6 = 1 It's Irish Math