On Thu, 30 Jun 2011 18:05:26 -0400, "Stormin Mormon"
wrote:

When I was in the fire service, we learned that both length
and diameter matters. Smaller hose increases pressure drop,
usually measured in psi drop per 100 feet of length.
500 foot hose has 5 times the pressure drop of 100 foot
hose.

Prove it.

You obviously weren't paying attention in class... so long as pressure
and diameter remains constant volume remains constant... it's when
there is pressure loss and diameter decreases that volume decreases...
fire hose diameter reduces even when moved around corners... every
sailer learns this from shipboard fire control tutorials. And were
you truly in fire service you'd know that fire hose lays flat when
unpressurized and it's diameter changes with changes in pressure...
all you did at the firehouse is polish the firemen's poles.