Aluminum Heavy-Duty 1 1/2" NH Ball Shut-Off With Pistol Grip Outlet Size_2 1/2 Inch tightening the clamps down to S5M25 Model:3117 (6.0 TPI x 3.062 OD) Program Issued Threads_NYFD x NYFD

tightening the clamps down to seal will reduce the diameter to the size of the hose

The most common fire hydrant outlet in the USA is 2 1/2 inches with NH / NST threads

The female threaded side of this adapter will only connect to a 2 1/2 inch male National Pipe Tapered (NPT) thread

Storz spanner wrench

The male threaded side of this adapter will only connect to a 1 inch female National Pipe Straight Hose (NPSH) or National Pipe Tapered (NPT)

Aluminum Heavy Duty 1 1 2" NH Ball Shut Off With Pistol Grip Outlet Size_2 1 2 Inch tightening the clamps down to S5M25 Model:3117 (6.0 TPI x 3.062 OD) Program Issued Threads_NYFD x NYFD tightening the clamps down to seal will reduce the diameter to the size of the hose The most common fire hydrant outlet in the USA is 2 1 2 inches with NH NST threads