Blue Lagoon Xpert AOP 75W V2.0 – Replacement Quartz Glass Sleeve (QG109, 925 × 30 mm)

Blue Lagoon Xpert AOP 75W V2.0 – Replacement Quartz Glass Sleeve (QG109)

Maintain peak UV-C performance in your Blue Lagoon Xpert AOP Compact Ozone & UV-C 75W V2.0 system with this genuine replacement quartz glass sleeve (article code QG109). The quartz glass sleeve is a critical component that surrounds the UV-C lamp inside the system, protecting it from direct contact with water while allowing UV-C radiation to pass through with minimal attenuation. Over time, quartz glass can develop cloudiness, etching, or micro-cracks — all of which reduce UV-C transmission and significantly lower disinfection effectiveness, even if the lamp and electronics are in perfect condition.

Why the Quartz Glass Sleeve Matters

Quartz glass is used because it is highly transparent to UV-C radiation (wavelengths around 253.7 nm), unlike regular borosilicate glass which blocks most UV-C. As the sleeve ages, mineral scale, biofilm, and micro-abrasions from cleaning accumulate on the surface and within the glass structure. Even a thin layer of fouling can reduce UV-C transmission by 30–50%, meaning bacteria and other pathogens pass through the system without being properly inactivated. Replacing the quartz sleeve restores full UV-C intensity and ensures your pool or spa water meets disinfection standards.

Signs the Quartz Sleeve Needs Replacing

You should inspect and consider replacing the quartz glass sleeve if you notice any of the following: visible cloudiness, yellowing, or permanent staining that cannot be cleaned off; hairline cracks or chips anywhere on the sleeve; water entering the UV-C chamber (indicating a seal or sleeve failure); or persistent water quality issues despite a functioning lamp and electronics. As a rule of thumb, quartz sleeves should be inspected annually and replaced every 2–3 years under normal operating conditions, or immediately if damage is found.

Specifications & Compatibility

This sleeve measures 925 mm in length with a 30 mm outer diameter and open-end design (type AM). It is manufactured to VSC (Vycor Silica Crystal) specification for maximum UV-C transmittance and thermal resistance. Compatible exclusively with the Blue Lagoon Xpert AOP Compact Ozone & UV-C 75W V2.0.