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Frequently asked questions

Match your system's model number (UV 107, 403, 405, or the 412–800 LCD/LCD+ range) to the equivalent lamp code — check the label on your UV chamber if you're not sure which model you have.

Roughly every 9,000–12,000 hours, around once a year for typical continuous use — UV output drops before the lamp visibly fails, so don't wait for it to go out.

From 12W up to 40W depending on your system size — smaller UV 107 units use lower-wattage lamps, while the larger 412–800 LCD/LCD+ range uses 40W lamps. Check the specific product listing for your model's rating.

We'd recommend sticking with the matched lamp code, since UV output and fit are engineered to the specific chamber — check with us if you're unsure of an equivalent.

The lamp keeps lighting up but its UV output falls below the level needed for reliable disinfection, so water may no longer be properly treated even though the system looks like it's working.