Fire monitors and their nozzles · Flow rate and pressure, stream pattern (straight stream, fog), monitor rotation and elevation, inlet size, mounting (deck or portable), materials and nozzle standards
A fire monitor (water cannon) is a large-flow appliance that aims water or foam solution from a fixed or portable base, and its nozzle head shapes that flow into a straight stream or fog pattern and sets its reach. Settle three things before asking for quotes: the flow and pressure the water supply and pump deliver, the stream pattern and reach the hazard needs, and the monitor's movement range, inlets, mounting and materials.
Nozzle heads for fire monitors and water cannons — fixed, adjustable-pattern and fog nozzles — together with the monitors that carry them, deck-mounted, portable or fixed on site. Handline hose nozzles are compared only; sprinklers, industrial spray nozzles and complete fire trucks are outside this page.
01
Akron Brass's Apollo dual-inlet monitor is specified to flow 1,250 gpm in deck mode and 800 gpm in portable mode through a full 3-inch waterway with cast-in turning vanes in each elbow. [1]
For pattern control, Akron's Assault fixed-orifice fire hose nozzle changes from straight stream to fog with a quarter turn, lets the buyer specify pressure and flow, and is described as giving better stream performance at pressures as low as 50 psi. [2]
Akron states that NFPA 1964, the standard for portable adjustable-pattern nozzles for general fire department use, was adopted in 1988, and that its nozzles have been designed and tested to comply with it since then. [3]
Editorial calculation: 1,250 gpm × 3.785 ≈ 4,730 L/min and 800 gpm ≈ 3,030 L/min, so a monitor on a portable base needs a supply of about 3,000 L/min at the nozzle's rated pressure, plus hose and elevation losses. [1]
Give the supplier the agent (water, foam solution), design flow rate and nozzle pressure, stream pattern (fixed straight stream, adjustable straight stream to fog, automatic constant-pressure), required reach, monitor type (fixed, deck, portable, remote-controlled), rotation and elevation range, inlet size and thread or flange, materials and finish, standards or approvals required, and quantity.
02
The Apollo monitor has handwheel elevation control from 90° above to 15° below horizontal with a safety stop at 35° above horizontal, 360° continuous rotation in deck mode and 180° in portable mode, horizontal locking and stops against over-rotation, two 2½- or 3-inch clappered swivel inlets on a portable base with folding legs, and a 3-inch NPT and flange combination deck mount on one version. [1]
The same monitor is rated 1,250 gpm on a deck mount but 800 gpm on its portable base, so ask for the rated flow for each mounting you plan to use. [1]
03
A fixed industrial monitor is ordered differently from a fire-apparatus monitor: the inlet is a pipe flange, the outlet carries a fixed-flow nozzle, and the nozzle's flow at a given pressure is set by its K-factor. Perimeter Solutions' Solberg data sheet for the Task Force Tips PROTECTOR manual monitor shows the fields such an order needs. [4]
The PROTECTOR is a fixed-mount manual monitor rated for flows up to 1,250 gpm (4,732 L/min), in hard-coat anodised and powder-coated aluminium alloy with an integrated stainless steel ball shutoff that shows valve position. It takes a 3 or 4 inch ANSI 150 inlet (or DN80/DN100 PN16 flanges) and a 2.5 inch (65 mm) outlet in NH, BSP or NPSH threads, turns through a continuous 360° on a tiller bar with a lever-action rotational lock, and elevates from 45° below to 90° above horizontal. Its matching ZN and ZM fixed-flow industrial nozzles give a straight stream or a wide fog pattern, accept low-expansion foam attachments, and are built to the customer's flow and pressure: the sheet states that the K-factor must be specified at the time of order. Approximate shipping weight is 35 lb (16 kg). [4]
Editorial calculation: a fixed-flow nozzle follows Q = K × √P. A nozzle sized for 1,000 gpm at 100 psi has K = 1,000 ÷ √100 = 100; on a supply that delivers only 64 psi at the monitor it flows 100 × √64 = 800 gpm, a 20% shortfall. Give the supplier the residual pressure your fire main delivers at the monitor at design flow, not the static pressure. [4]
| Field | PROTECTOR example | Ask the supplier for |
|---|---|---|
| Inlet | 3 or 4 in ANSI 150; DN80/DN100 PN16. [4] | Flange standard and rating. |
| Outlet / nozzle thread | 2.5 in (65 mm) NH, BSP or NPSH. [4] | Thread to match nozzle. |
| Flow | Up to 1,250 gpm (4,732 L/min). [4] | K-factor and flow at your pressure. |
| Movement | 360° horizontal; −45° to +90° vertical. [4] | Locks and stops. |
| Weight | About 35 lb (16 kg) shipping. [4] | Mounting load. |
04
CA Fire lists manual, gear, remote-control and automatic water and foam-water monitors; Forede lists monitors, handline nozzles and water cannons; Mistec lists fire fighting nozzles inside a spray nozzle range.
Ask each supplier for rated flow and pressure for each nozzle setting, stream reach test data, monitor movement range, inlet and outlet connections, and approval certificates. [1] [3]
05
06
Nine of the twelve rows carry a published Akron or Solberg value; maximum pressure, operating temperature and pressure drop are not stated in the four sources and have to come from the supplier.
| Field | What it means and published values | Ask the supplier for |
|---|---|---|
| Inlet Connection Size | 2½ or 3 in inlets; 3 in waterway (Apollo). [1] | mm; thread or flange. |
| Flow Rate | 1,250 gpm deck; 800 gpm portable. [1] | L/min. |
| Operating Pressure | Assault: better stream performance at pressures as low as 50 psi; rated 150 gpm at 100 psi. [2] | MPa at nozzle. |
| Maximum Pressure | Rated limit. | MPa. |
| Operating Temperature | Service limits. | °C. |
| Material Grade | PROTECTOR: aluminium alloy, hard-coat anodised and powder-coated [4]; Apollo: Pyrolite construction. [1] | Alloy; finish. |
| Weight | Apollo: base 32 lb, lift-off 23 lb [1]; PROTECTOR: about 35 lb (16 kg) shipping. [4] | kg. |
| Spray Angle | Straight stream to fog [2]; NFPA 1964 requires a minimum fog pattern angle. [3] | ° fog. |
| Thread Type | NPT and flange deck mount (Apollo) [1]; 2.5 in outlet in NH, BSP or NPSH (PROTECTOR). [4] | Thread standard. |
| Seal Material | PROTECTOR: integrated polymer wear rings and seals. [4] | Material. |
| Surface Finish | PROTECTOR: powder-coated fire engine red, internal powder coating in the waterway. [4] | μm or coating. |
| Pressure Drop | Loss through monitor and nozzle. | MPa at flow. |
07
Paste it into your enquiry below or into an email to a maker, then replace every bracket.
Agent: [water; foam solution] Flow/pressure: [L/min; MPa at nozzle] Pattern: [straight stream; fog; adjustable] Monitor: [fixed; deck; portable; remote] Movement: [rotation °; elevation °] Connections: [inlet size; thread; flange] Approvals: [standards] Quantity: [units]
3 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
Lists fire monitors — manual, gear, remote-control and automatic water and foam-water cannons — and fire hose nozzles.
Product scope checked 2026-10-11
Lists fire monitors, handline fire nozzles and water cannons among its fire-protection products.
Product scope checked 2026-10-11
Lists fire fighting nozzles in its spray nozzle range.
Product scope checked 2026-10-11
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
Akron Brass's Apollo monitor flows 1,250 gpm deck-mounted and 800 gpm on its portable base. [1]
The Apollo rotates 360° in deck mode (180° portable) and elevates from 90° above to 15° below horizontal. [1]
NFPA 1964, adopted in 1988, covers portable adjustable-pattern nozzles for general fire department use. [3]
On Akron's Assault nozzle, a quarter turn changes the pattern from straight stream to fog. [2]
It sets flow at a given pressure (Q = K × √P); Solberg's PROTECTOR data sheet says the K-factor must be specified when the monitor is ordered. [4]
Sources checked 2026-10-12. Four sources: Akron Brass's Apollo monitor specification, its Mid-Range Assault nozzle page and its NFPA 1964 compliance note, plus Perimeter Solutions' Solberg data sheet for the Task Force Tips PROTECTOR fixed monitor.
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