245350 Wonder Quartz Thimble - Doomed end for Series C-180, Series CE-180, Series H-180 and Series HE-180 QJ24350DE

This is a domed-end quartz thimble for Wonder C-180, CE-180, H-180 and HE-180 UV disinfection systems, supplied by WrekinWater as part code QJ24350DE. Unlike the open-ended PC-range sleeves, this thimble is closed (domed) at one end, sealing that end of the chamber while the open end takes the lamp and retaining hardware. It is the entry-capacity sleeve in the 180/360/480 Wonder thimble series.

Signs your quartz sleeve needs replacing

• The thimble looks cloudy or milky rather than glass-clear when checked at a lamp change.
• You notice a brown or yellow film that does not wipe off easily.
• Your C-180/H-180 series unit's UV monitor has flagged a low-output warning.
• It has been in service for about 12 months, the point most owners renew it as routine maintenance.

On the C-180 and H-180 series units, this domed thimble is what keeps the lamp completely dry inside a wet chamber while still letting UV light radiate out through the quartz wall into the water. Because the domed end is sealed, any scaling or clouding on that closed section is easy to miss on a quick visual check, yet it still blocks UV output the same way fouling on an open-ended sleeve would. The lamp can carry on lighting normally while disinfection quietly weakens.

WrekinWater has supplied Wonder UV consumables like this thimble for 15 years from our base in Bettisfield, Shropshire, and this listing is matched to the specific C-180/CE-180/H-180/HE-180 series rather than a generic quartz tube. We are rated Excellent on Trustpilot by customers who have ordered exactly this kind of part before.

How to replace it

1. Isolate the water supply to the unit and switch off the power at the mains.
2. Undo the retaining nut or union at the open end of the chamber and withdraw the lamp.
3. Carefully slide out the old domed thimble from the open end of the housing.
4. Wipe out the housing and fit fresh O-rings before fitting the replacement.
5. Insert the new QJ24350DE thimble domed-end first, then refit the lamp and reassemble.
6. Restore water and power, then run the system to drain briefly before using the water.