4" NPSH Male x 5" NPSH Male Adapter Aluminum DMH3025F but you could also use

but you could also use some standard drinking jugs when you're on the go

5" NST (NH) Female To 2" NPSH Male Pipe

sump & trash pumps

6"  Female (Socket)

5" NST (NH) female threads

4" NPSH Male x 5" NPSH Male Adapter Aluminum DMH3025F but you could also useSpecifications Male Side 1 4 NPSH Male (National Pipe Straight Hose) Male Side 2 5 NPSH Male (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 236 8. 1 Through 8. 2