How do I calculate PSI of a garden hose?

I want to purchase a pond vaccuum which requires about 40 PSI. If I can measure the diameter of my garden hose [a pretty standard one] and the amount of gallons per minute, how do I figure out what my PSI is?

How do I calculate PSI of a garden hose?
The PSI is not the hose-it is your water pressure. The only thing that will assure that is a pressure regulator--I had a plumber put ours on because we live at the bottom of a hill and had water pressure at 200 PSI - needless to say with high pressure it bursts hoses.
Reply:Here's a much much easier way to figure it out.

Go to any Lowe's or Menards and actually buy a gauge that attaches to your garden hose and tells you what your pressure is! Report It
Reply:I've been pondering this one for a while, and I can give you an equation to do so, but it would be neglecting too many important variables. Right now all I would have is pressure and kinetic energies.



First off, what length hose are you planning on using? The friction head can really affect your outcome.



Second, is there any elevation change in the hose? The potential energy may not be great enough to note, but it wouldn't hurt to include.



Once you get this information, posting your question on the Science %26amp; Mathmatics %26gt;%26gt; Engineering forum and a Civil Engineer or Mechanical Engineer may be able to help you.