Fire hose nozzles control water at the delivery end of a hose. Threaded plastic and rubber-protected brass nozzles offer jet and spray patterns, while chrome plated brass ball valve nozzles use a lever to control a fixed jet. Hose-tail models connect directly inside the hose; female-threaded models connect to a male-threaded hose fitting.
The red polycarbonate FQN hose-reel nozzle has a 3/4" BSP female connection. Small Powerjet has a 1" BSP female connection and large Powerjet has a 1 1/2" BSP female connection. These threaded plastic designs provide jet, cone spray and fog patterns. Their 90psi pressure rating is a component limit, rather than a measure of flow or throw.
The rubber-protected GW239 brass nozzle has a 3/4" BSP female connection and twists to change the water pattern from a stream to a broad spray. Its pressure rating is 100psi. The BJS brass jet/spray nozzles have a rubber bumper, twist adjustment and a hose tail for either 3/4" or 1" hose. Their pressure rating is 150psi.
The chrome plated brass BVN20 and BVN25 nozzles have a ball valve with a stainless steel lever handle. The lever opens or closes the water passage, while the outlet forms a fixed jet. Both are rated to a maximum water pressure of 1600kPa and have a PTFE seal and EPDM O-ring. BVN20 suits 3/4" hose and BVN25 suits 1" hose.
The nylon fog nozzles have integral hose tails for 3/4" or 1" hose. The hose fits over the tail and is secured with a hose clamp. These are separate from the female-threaded Powerjet nozzles.
Thread sizes and hose-bore sizes describe different connections. A female-threaded nozzle screws onto a male-threaded fitting; a hose tail fits inside the hose. Flow and spray reach depend on water pressure at the nozzle and the resistance of the hose supplying it.