RQ-H53 - Atlas H53 Replacement Quartz Sleeve and Luminor RQ-420

This RQ-H53 sleeve is the replacement quartz sleeve for Atlas H53 UV systems, also fitting units listed under the Luminor RQ-420 reference. A new O-ring is supplied with it, covering the sleeve and seal in a single order. It shares the domed-end design used across the rest of Atlas's H-series.

Signs your quartz sleeve needs replacing

• The sleeve appears cloudy, scaled, or scratched.
• Brown or yellow staining has built up on the glass.
• The UV monitor or alarm is triggering while the lamp is still lit.
• It's been about 12 months since the sleeve was last replaced.

On the Atlas H53 (or Luminor RQ-420), the quartz sleeve separates the lamp from the water while letting UV light pass through to treat it. As the glass fouls or scratches, less UV light reaches the water, so disinfection can become unreliable even while the lamp continues to light up as normal. As the largest of the H-series lamps covered here, the H53 treats a higher flow, so a fouled sleeve has more water passing through it under-treated.

WrekinWater has supplied Atlas and Luminor-equivalent UV parts as part of a wider stock of major water treatment brands for over 15 years, and this listing includes a new O-ring alongside the sleeve. As a family business rated Excellent on Trustpilot, we're happy to confirm which model you have before you order if your unit isn't clearly labelled.

How to replace it

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