"Edwin Pawlowski" wrote in message
. com...

snip You have been told by me and others that increasing the diameter is
not going to increase pressure. snip


See article at
http://www.bobvila.com/HowTo_Library...ing-A1895.html

"The plumber and the plumbing designer rely on the internal diameter of the
water delivery pipes to control water pressure. The smaller the pipe
diameter, the lower the pressure and the greater the velocity of the water
moving through it."

"... manipulation of pressure is achieved entirely by varying the internal
diameters of the pipes."

Ken



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