If a 1 1/4-inch solid stream nozzle is flowing at 50 PSI, what is the approximate GPM?

To determine the approximate gallons per minute (GPM) for a 1 1/4-inch solid stream nozzle flowing at 50 PSI, you can use the formula that relates the nozzle diameter and the pressure to flow rate.

For a 1 1/4-inch nozzle, which has a diameter of 1.25 inches, a common approximation for flow rate (GPM) with the nozzle flowing at a certain pressure (PSI) can be calculated using the following formula:

GPM = (29.7 × Diameter² × √Pressure)

In this case, the diameter is 1.25 inches, and the pressure is 50 PSI. Plugging in these values:

GPM = 29.7 × (1.25)² × √50

Calculating (1.25)² gives 1.5625, and then the square root of 50 is approximately 7.07.

Now, calculating the flow rate:

GPM ≈ 29.7 × 1.5625 × 7.07

GPM ≈ 29.7 × 11.1807

GPM ≈ 332.73

Rounding this to an approximate figure leads us to around