Marion Fire Department Hose Thread Specifications

Forestry Line 1" Coupling

• National Standard Thread
• National Hose (NH) Style

1 1/2" Hose Coupling

• 1.99" Thread Diameter
• 9 Threads Per Inch
• 1.5" Inside Diameter
• National Hose (NH) Style

2 1/2" Hose Coupling

• 3.078" Thread Diameter
• 6 Thread Per Inch
• 2.5" Inside Diameter
• National Hose (NH) Style

4 1/2" Hose Coupling (Hydrant Steamer Coupling)

• 5.766" Thread Diameter
• 4 Threads Per Inch
• 4.5" Inside Diameter
• National Standard Thread

Storz Coupling

• 5" Hose Size