Pump Discharge Pressure (PDP) = Nozzle Pressure (NP) + Friction Loss (FL) of hoselay \u00b1 Head Pressure (HP)<\/p>\n
GPM (Gallons Per Minute) and NP:<\/p>\n
Forester<\/p>\n
3\/16 tip: 7 gpm (50 psi NP)
\n3\/8 tip: 30 gpm (50 psi NP)<\/p>\n
Variable Pattern (Adjustable Barrel)<\/p>\n
1 inch: 20 gpm (100 psi NP)
\n1\u00bd inch: 60 gpm (100 psi NP)<\/p>\n
FL for 1″ hose:<\/p>\n
10 gpm = 3 psi per 100 ft.
\n20 gpm = 10 psi per 100 ft.
\n30 gpm = 23 psi per 100 ft.<\/p>\n
FL for 1\u00bd” hose:<\/p>\n
20 gpm = 1 psi per 100 ft.
\n30 gpm = 3 psi per 100 ft.
\n60 gpm = 13 psi per 100 ft.<\/p>\n
HP: Add or subtract 1 psi for every 2 foot elevation change.<\/p>\n
Gallons of water to fill 100 feet of hose:<\/p>\n
\u00be” hose \u2248 2 gals.
\n1″ hose \u2248 4 gals.
\n1\u00bd” hose \u2248 9 gals.<\/p>\n
Maximum effective lift for drafting = 22 feet at sea level, 14 feet at 8,000 ft. elevation.<\/p>\n
Loss of 1 foot draft per 1000 feet elevation.<\/p>\n
Use check and bleeder valve on pump discharge when pumping uphill to prevent back flow into the pump.<\/p>\n
A parallel hose lay will have \u00bc the friction loss of a single hoselay.<\/p>\n","protected":false},"excerpt":{"rendered":"