Choosing guide
How to pick a rotating nozzle without wasting money
Flow decides everything
A rotating nozzle is a fixed orifice with a spinning rotor. The orifice is sized for a flow range, and pressure is what happens when your pump pushes that flow through it. Put a 4 GPM nozzle on a 1.6 GPM electric washer and you lose pressure, the rotor barely spins, and the pattern wanders. Match GPM first, then check that your pressure sits inside the nozzle's range.
The PSI on the box is a ceiling, not a promise
A '4000 PSI' rating means the nozzle survives 4000 PSI. It does not mean it produces it. Two nozzles with the same PSI rating and different orifice sizes behave completely differently on the same machine.
Connections are not interchangeable
Most consumer machines use a 1/4 inch quick connect. Industrial rotors are threaded, usually NPT, and BSP threads are not the same as NPT even when they look close. If a nozzle needs an adapter, budget for it.
Hot water is a separate rating
Seals and seats decide whether a nozzle survives hot water. A cold-only rotor on a hot-water machine fails quickly and can fail suddenly. If you run heat, filter on hot-water rated only.
Rebuildable pays for itself
Rotors and seats wear. On a machine used weekly, a rebuildable nozzle with an available repair kit is cheaper across two seasons than three throwaway units — and it keeps working consistently instead of gradually going dull.
Where the specs come from
Each listing records the manufacturer source and the date it was checked. When a manufacturer's own page contradicts itself — and it happens more often than you would expect — we keep both claims and flag the conflict rather than publishing a confident guess.