RQ-41 - Atlas L41 Replacement Quartz Sleeve and Luminor RQ-820

This RQ-41 sleeve is the replacement quartz sleeve for Atlas L41 UV systems, also matching units specified as a Luminor RQ-820. It's supplied with a new O-ring, so the seal is taken care of at the same time as the sleeve. Like the rest of the Atlas L-series, it has a domed end rather than an open, O-ring-at-both-ends design.

Signs your quartz sleeve needs replacing

• Visible cloudiness or scratching on the quartz.
• Brown or yellow discolouration building up on the sleeve.
• UV monitor or alarm triggering despite a lamp that's lighting normally.
• The sleeve has been in place for around 12 months or more.

The quartz sleeve on an Atlas L41 (or Luminor RQ-820) protects the lamp from direct contact with the water while still letting UV light through to treat it. As the glass fouls or scratches, UV transmittance drops steadily, which means disinfection can become unreliable long before the lamp gives any visible sign of a problem. Because the L41 is a higher-output lamp than the smaller L22, a fouled sleeve here has a proportionally bigger impact on treated water volume.

WrekinWater has supplied UV parts across brands including Atlas and Luminor-labelled equivalents for over 15 years from our Shropshire base, and this listing includes a new O-ring so the whole job is covered in one order. As a family firm rated Excellent on Trustpilot, we'd rather you call and check than order the wrong sleeve for your system.

How to replace it

1. Isolate the water supply and drain the UV housing.
2. Undo the retaining nut or union and withdraw the lamp, then the old sleeve.
3. Clean any scale or fouling from the housing before fitting the new sleeve.
4. Fit the supplied O-ring and insert the new sleeve, domed end first.
5. Refit the lamp, restore water and power, then run to drain briefly before use.