4.5" NPT Female (Rigid Long Handle) x 4" NH (NST) Male Adapter Aluminum HA4525F and you can unhook them

and you can unhook them at 50

even after tightening) Connection Type NH Female Pressure 100 psi (7bar) Nozzle Body Style Nozzle with shutoff and pistol grip Valve Design Ball Valve (Stainless) Valve Actuation Method Horseshoe (Injection Molded Nylon w/ Colored Handle) Fog Pattern Method cut metal teeth (fixed) Nozzle Bumper Material Rubber - press fit Certifications NFPA/FM Foam Expansion Performance N/A Pattern Actuation Method Manual

but if you need to hook it into another outlet

Female Side 1 – 3” NH (NST) Female (National Hose / National Standard Thread)

4.5" NPT Female (Rigid Long Handle) x 4" NH (NST) Male Adapter Aluminum HA4525F and you can unhook themSpecifications Female Side 1 4. 5 NPT Female (National Pipe Tapered) Male Side 2 4 NH (NST) Male (National Hose National Standard Thread) 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 236 8. 1