What is the pump discharge pressure with a layout using two 1 1/2 inch hose lines each 100 feet long discharging 100 GPM?

To determine the pump discharge pressure for a layout with two 1 1/2 inch hose lines each 100 feet long discharging 100 GPM, we need to use the principles of friction loss and elevation gain, if applicable.

First, it's essential to calculate the friction loss for two 100-foot lines. The friction loss in a standard 1 1/2 inch hose can be approximately calculated using the formula:

Friction Loss (FL) = (Length of Hose / 100) × (GPM^2 / 100), where GPM is the flow rate in gallons per minute.

Since each line is 100 feet long and the total flow is 100 GPM, we can calculate the friction loss for each line:

1. For each 100-foot section:

FL = (100 / 100) × (100^2 / 100)

FL = 1 × (100 / 100)

FL = 1 psi per line.

2. Since there are two lines, we multiply the friction loss for one line by two:

Total Friction Loss = 1 psi × 2 = 2 psi.

Next, we need to consider the nozzle reaction or appliance, which