RO, converting gallons per minute to pressure

[glenn10]

I am considering getting an RO unit but am concerned about having enough pressure. My system puts out 22-23 gallons per minute. Is there a way to convert that number to find out what my pressure is without buying a gauge?

 

[73stingray]

Been a while since Fluid Dynamics but I think its P = 1/2 * p * V^2 (from Bernoulli's Equation)
P = pressure
p = fluid density ( water is about 1000 kg/m^3)
V = streamline velocity of the fluid = (flow rate)/(cross sectional area of pipe or tube containing the fluid)

 

[dwehlage]

Unfortunately, there is no way to convert gpm to pressure. The pressure depends strictly on your pump, and the downstream restrictions.
73Stingray is partially right. Bernoulli's equation states that total pressure is equal to static pressure plus dynamic pressure. The formula stated is for the dynamic pressure only.
Recommend if it is a concern, you buy a pressure gauge to be sure. They are readily available at a hardware store for less than $10. - replacements for water pressure systems.

 

[glenn10]

I bought a guage($10) as you suggested and I am getting 50 pounds of pressure. Should that be enough?