QJ25250DE - Compatible Quartz Sleeve for UV SUV-S-4 - (Domed Ended)

This is a compatible domed-ended quartz sleeve for the SUV-S-4-1/4 UV disinfection system, rated at 3.8 litres per minute, supplied by WrekinWater as part code QJ25250DE. It is the smallest-capacity sleeve in the Sabre range covered in this listing, sized to the SUV-S-4's compact chamber. The domed end seals one side of the sleeve while the open end takes the lamp and retaining hardware.

Signs your quartz sleeve needs replacing

• The sleeve appears cloudy or scratched instead of clear when inspected at a lamp change.
• A yellow or brown film has built up that does not clean off easily.
• The SUV-S-4's UV monitor or indicator light is showing a low-dose warning.
• The sleeve has been in use for roughly 12 months, the usual point to renew it.

In the compact SUV-S-4-1/4 chamber, this sleeve keeps the lamp completely dry while letting its UV output reach the 3.8 litres per minute of water flowing past it. On a small-flow unit like this, even light scaling or scratching on the quartz can meaningfully cut UV transmittance relative to the water volume being treated, so disinfection can fall below a safe level while the lamp still lights normally.

WrekinWater lists this as a compatible sleeve specifically for the SUV-S-4-1/4, rated to the same 3.8 LPM flow as the original, drawing on 15 years of supplying UV consumables. We are Excellent-rated on Trustpilot and happy to confirm fit against your exact Sabre model before you order.

How to replace it

1. Isolate the water supply to the SUV-S-4 unit and switch off power at the mains.
2. Undo the retaining nut or union at the open end of the housing and withdraw the lamp.
3. Slide the old QJ25250DE sleeve out of the chamber.
4. Clean the housing and fit new O-rings before fitting the replacement.
5. Insert the new sleeve domed-end first, refit the lamp, and reassemble the housing.
6. Restore the water supply and power, then flush briefly to drain before use.