Description
RK2/XFLO Quartz Sleeve U200000-25MM648D Quartz Sleeve | 25 mm Diameter • Approx. 648 mm Length (~25.5″) • OEM Replacement for RK2/XFLO UV Systems
The RK2/XFLO Quartz Sleeve U200000-25MM648D quartz sleeve is a genuine replacement part designed for certain models of the XFLO / RK2 UV steriliser systems. With an outer diameter of 25 mm and a length of approximately 648 mm (~25.5 inches), it fits reactors that use this specific sleeve size. Using the correct sleeve helps ensure optimal UV-C transmission, protects the lamp, and maintains system performance.
Key Features
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25 mm outer diameter — matches the OEM sleeve size used in many XFLO/RK2 units.
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Approx. 648 mm length (~25.5″) — for reactors that require a mid-length sleeve in that size range.
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Hard-quartz construction — designed to provide excellent UV-C transmission and durability under UV stress, thermal cycling and aquatic environment conditions.
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OEM compatibility — listed in the XFLO parts list as “DQTZ SLV, 25MM, 648MM, 25.50″”.
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Maintains steriliser efficiency — replacing old or damaged sleeves helps ensure your UV steriliser continues to deliver the correct dose and operate effectively.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | U200000-25MM648D |
| Outer Diameter | 25 mm (~1″) |
| Length | ~648 mm (~25.5″) |
| Material | Hard-quartz glass |
| Typical Application | Replacement for XFLO/RK2 UV reactors using this sleeve size |
Applications
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Replacement quartz sleeve for XFLO/RK2 steriliser vessels that originally used the ~648 mm length sleeve.
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Ideal for aquarium, pond or water-treatment systems where correct sleeve length & diameter are critical to maintaining UV steriliser performance.
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Useful for service technicians or maintenance inventory needing the correct OEM sleeve for mid-length reactor models.
Benefits
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Helps restore and maintain effective UV-C exposure by replacing sleeves that may have become fouled, clouded or damaged.
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OEM-correct size ensures compatibility, reducing risk of mis-fit and maintaining system integrity.
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By ensuring the reactor has the correct quartz sleeve, you help maintain clarity, lamp life and system reliability.
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Simplifies maintenance by using a part matched to the original system specification.
Installation & Maintenance Tips
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Ensure the UV steriliser is powered off and depressurised before removing the old quartz sleeve.
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Remove the old sleeve carefully and check O-rings/gaskets at the same time; replace seals if they show wear or damage.
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Handle the new sleeve with care — do not touch the quartz surface with bare hands as oils may reduce UV transmission.
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Inspect the sleeve for any scratches, chips or defects before installation.
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After installation, verify proper seating and sealing, watch for leaks, and monitor system performance.
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Periodically inspect the sleeve during operating life; if you see clouding, scaling or deposit build-up, clean or replace the sleeve to maintain UV performance.
The RK2/XFLO Quartz Sleeve U200000-25MM648D quartz sleeve is a vital maintenance component for XFLO/RK2 UV steriliser systems that require a 25 mm diameter sleeve approximately 648 mm in length. Using the correct OEM replacement helps ensure the UV system continues to perform to specification, delivering efficient sterilisation and sustaining system clarity, lamp life and reliability.