Aluminum 1" Dual Range 10/30 Fire Nozzle (NH) Pick One Side_4 1/2 Inch and the application

and the application

It can even be referred to as NHT or National Hose Thread but NST or NH is more common these days

This hook can be the one tool used probe ceilings floors

Dry hydrant sizes are determined by your local fire department

Type "C" stainless steel 2 1/2 inch female camlock (Cam & Groove) coupler to 2 1/2 inch hose shank

Aluminum 1" Dual Range 10/30 Fire Nozzle (NH) Pick One Side_4 1/2 Inch and the applicationDual Range Nozzles perform over a wider range of water pressures than constant flow nozzles and give the operator more GPM control with both a low flow and a high flow rate. This aluminum twist nozzle initially opens to the lower GPM range straight stream pattern, then the low range fog pattern, then high GPM straight stream and finally high GPM fog pattern. Simply twist the barrel to adjust the patterns and to turn on off. If you have lower water