Brooklyn1 wrote:
On Thu, 30 Jun 2011 07:22:08 -0700, "Bob F"
wrote:

Stormin Mormon wrote:
80 cents a foot? That's more pricey than garden hose?

A 500 foot garden hose isn't going to pass much water.

Why not? Hose length has no bearing on water volume, only diameter
matters.


A warning to all, Brooklyn1 has a habit of making confident pronouncements
that are wrong.

The friction and hence head loss depends on both the length and diameter
(and the number of fittings and joins and the change in level).
Particularly in a thin pipe a long run (say 500ft) will have greater head
loss than a short one (say 50ft) using the same source. The difference is
less noticeable on large diameter pipe.

If you want to do the sums yourself see he

http://www.polypipe.com.au/images/PP...m%20design.pdf

David