Aluminum 1 1/2" Female NH to 1 1/2" Male NPSH Threads_NPSH Back flush flap is drawn

Back flush flap is drawn closed during suction operation

Spanners have smoothly rounded edges

Equivalent part number - HA4525F

5 inch NPT or NPSH male hose coupling is 2

Equivalent part number - HA2520

Aluminum 1 1/2" Female NH to 1 1/2" Male NPSH Threads_NPSH Back flush flap is drawnUSDA Forestry Service fire hose reducer feature aluminum coupling with a 600 PSI test pressure. Meet Forest Service Spec 5100 107. Female 1 1 2 inch NH, 9 threads per inch and male 1 1 2 inch NPSH, 11 1 2 threads per inch. Meets National Fire Equipment System (NFES #0006). Water Handling Accessories flow rates are 100 PSI flowing pressure. Fire hose reducer female adapters comes with a gasket. This Wildland Fire Equipment adapter or coupling is used