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Frequently Asked Questions
What is dead-man action?
It flows only while the trigger is held.
Release it and the water stops at once.
So a dropped gun stops instead of thrashing.
In a wet room at pressure that matters.
It is the defining safety behaviour.
Should a gun have a hold-open catch?
Treat it as a decision, not a feature.
A latch defeats the dead-man action.
Which is the behaviour the gun exists for.
Many plants specify guns without one.
Ask before assuming either way.
Why change the spray pattern?
Because rinsing and cutting are different jobs.
A wide fan moves debris gently.
A narrow jet cuts into build-up.
Having both stops a jet being used for everything.
Which is where aerosols come from.
Why do aerosols matter?
A hard jet on a soiled surface throws mist.
That mist lands somewhere else.
Carrying whatever was on the first surface.
In food and clinical areas that is the risk.
Use the widest pattern that works.
What makes one last longer?
Surviving being dropped.
It is held in a wet glove all day.
And falls onto hard floors.
Body material and trigger robustness decide.
More than any other factor.
Why are some bodies insulated?
Because the gun carries the water temperature.
Straight into the operator's hand.
Sanitising water is hot enough to hurt.
A jacket or insulated grip breaks that path.
Worth specifying on hot systems.
How is a gun matched to the station?
By flow rate and pressure rating.
Not just by the hose connection.
Rated below the supply it is a failure point.
Far above it, the patterns underperform.
Match it to what the station delivers.