Pumps

Can Pump Do It?

Pump Type: Mark 3 (Max 380 PSI) Type 6 Engine (Max 100 PSI) Type 3 Engine (Max 250 PSI) 1.5″ Hose Sections (100 ft each): 1″ Hose Sections (100 ft each): Elevation Gain or Loss (ft): Nozzle Type (IRPG Preset): ¾” Tip – 10 GPM @ 100 PSI ⅜” Tip – 12 GPM @ 50 PSI Adjustable Fog – 15 GPM @ 100 PSI 1″ Tip – 20 GPM @ 100 PSI 1″ Combo Nozzle – 20 GPM @ 100 PSI Calculate Copy Results

📘 IRPG 2025 – Water Delivery Information (Page 88)

🔹 Approximate Volume of Water per 100 Feet of Hose:

Hose Diameter	Gallons
¾ inch	2 gal
1 inch	4 gal
1½ inch	9 gal
1¾ inch	11 gal
2 inch	16 gal
2½ inch	25 gal

🔹 Nozzle Pressure Recommendations:

Nozzle Type	Pressure (PSI)
Straight Tip	50–100
Fog Nozzle	100
Adjustable Combo	100

🔹 Friction Loss (Approximate per 100 ft at 15 GPM):

Hose Size	Friction Loss (PSI)
1½ inch	1 PSI
1 inch	5 PSI
¾ inch	12 PSI

🔹 Elevation Pressure:

+0.5 PSI per foot gained
–0.5 PSI per foot lost

🔹 Pump Discharge Pressure (PDP):

PDP = Friction Loss (FL)
    + Elevation (E)
    + Nozzle Pressure (NP)
  

🔹 Example:

• 300 ft of 1.5″ hose
• 60 ft elevation gain
• Fog nozzle (100 PSI)

FL: 3 sections × 1 PSI = 3 PSI
E: 60 ft × 0.5 = 30 PSI
NP: 100 PSI

Total PDP: 3 + 30 + 100 = 133 PSI