4" NH (NST) Female Swivel x 6" NPSH Female Rigid Adapter Aluminum FM3030F Industrial & Fire 4” NH

Industrial & Fire 4” NH (NST) Female x 5" NPSH Male Fitting Anodized Aluminum

Note: this is just a graphic illustration

The NST (NH) side of adapter can hook into NST (NH) threads only

Using 3" White Double Layered Fire Hose Without Fittings

They usually require added modifications like switches and extension cords

4" NH (NST) Female Swivel x 6" NPSH Female Rigid Adapter Aluminum FM3030F Industrial & Fire 4” NHSpecifications Female Side 1 4 NH (NST) Female (National Hose National Standard Thread) Female Side 2 6" NPSH Female (National Pipe Straight Hose) Working Pressure 300PSI Max Test Pressure 1000PSI Max Material T 6061 Aluminum (Aircraft Grade) Finishing Anodized (99. 9% Lead Free) NFPA Standards 1963, 4. 12, 5. 1 5. 6. 4 (Corrosion Resistance) Military Standards MIL A 8625 Type III, Class 1 Industrial Standards International ASTM B221 UL Labs Standards