UV Sanitization
UV sanitization uses ultraviolet light to inactivate microorganisms in pool water as it passes through a UV chamber in the equipment line.
Definition
UV sanitization uses ultraviolet light to inactivate microorganisms in pool water as it passes through a UV chamber in the equipment line.
Typical Values: Requires a chlorine residual of 0.5–1.0 ppm minimum with UV supplementation
In Plain Language
UV sanitizers are installed inline in the return line. Water passes through a chamber exposed to UV-C light (254 nm), which disrupts the DNA of bacteria, viruses, and algae. UV is highly effective at inactivating Cryptosporidium, which is resistant to chlorine. UV systems do not provide a residual sanitiser — a chlorine or bromine residual is still required. UV reduces the amount of chlorine needed to maintain adequate residual.
Why It Matters
UV systems can reduce chlorine demand by 50–80%, reducing chloramine formation and the quantity of chemicals needed.
Typical Values
Requires a chlorine residual of 0.5–1.0 ppm minimum with UV supplementation
Last reviewed: 2026-06-01