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Frequently asked questions

Match your system's model number (V90, V100, V110-V130, V140, V150, V160/V200, V170/V180/V220, or V190) 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.

Genuine lamps are original manufacturer parts; compatible lamps are third-party equivalents built to match the same fitting and output at a lower price point. Both are listed for each model — check the specific listing for which type you're ordering.

We'd recommend sticking with a lamp matched to your model, 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.