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Frequently Asked Questions
Can UV replace chlorine?
No, and it is not sold as a replacement.
UV treats only water inside the chamber.
Water leaving it carries no protection.
Contamination in the pool must still be handled.
A residual sanitiser remains necessary.
UV reduces what that residual has to cope with.
What is the strongest reason to fit UV?
Chloramine destruction.
Combined chlorine causes the smell and eye irritation.
People attribute that to too much chlorine.
UV breaks those compounds down.
Indoor and busy commercial pools benefit most.
Air quality improves noticeably.
How is a UV system sized?
By dose, which depends on flow.
Higher flow means less exposure per pass.
A lamp is rated against a stated flow rate.
Variable-speed pumps change the operating flow.
Size against the actual regime, not the peak.
Confirm the dose at the flow that will be used.
How often do lamps need changing?
On hours run, not on failure.
Output falls long before a lamp stops lighting.
A lit lamp can be delivering an inadequate dose.
Manufacturers publish a replacement interval.
An intensity sensor reports actual output.
Without one the interval is all you have.
What is the quartz sleeve and why does it matter?
It separates the lamp from the water.
Scale and film build up on its surface.
That blocks light while everything looks normal.
Cleaning frequency follows water hardness.
Some systems wipe the sleeve mechanically.
It is the most commonly neglected item.