A highly effective, non-chemical water disinfection method that utilizes germicidal Ultraviolet (UV) light to neutralize waterborne microorganisms. The system directs water flow past a specialized UV lamp encased in a quartz sleeve. The UV-C light (specifically at 254 nm wavelength) penetrates the cell walls of bacteria, viruses, and protozoa, disrupting their DNA and rendering them unable to reproduce, effectively killing them. It is used as a final stage of disinfection in both domestic and commercial settings, particularly when the water source is susceptible to microbial contamination, offering safe water without altering its taste or chemical composition.