Repair kit - Seals for Round Cleaner UFO

Repair kit - seals for Round Cleaner UFO - a complete set of sealing and guiding elements for servicing a “round cleaner” type attachment. It includes 2× sliding ring D=12 mm and 2× O-ring d=15 mm, i.e. parts responsible for sealing and stable operation of joints / moving elements in the accessory. Replacing this kit is a typical service operation when leaks appear or when the attachment no longer operates as smoothly as it should.

MPN / reference: 138081
Contents: 2× sliding ring D=12 mm, 2× O-ring d=15 mm

APPLICATION

The kit is used during maintenance and repair of the Round Cleaner UFO, including:

• regeneration of seals after long operation on contaminated water,
• eliminating leaks around joints and elements operating under movement,
• restoring proper guidance of moving elements (sliding rings) and sealing pressure (O-rings),
• servicing after disassembly of the accessory, when old seals are already flattened or damaged.

SYMPTOMS - WHEN IT’S WORTH REPLACING

It is worth replacing the kit when the following occurs:

• water leakage around joints or moving parts of the round cleaner,
• “sweating” and wet marks around the housing despite correct tightening,
• loss of tightness after reassembly following service / cleaning,
• worsened mechanical operation (play, uneven guiding action),
• visible flattening, cracks, or cuts on the O-rings after disassembly.

HOW TO CHOOSE THE RIGHT PART

For seals used in accessories, selection is best based on identifying the kit:

• confirm the part number: MPN 138081,
• verify the contents: 2× sliding ring D=12 mm and 2× O-ring d=15 mm,
• compare the removed parts (diameters and cross-sections), especially if the accessory has been repaired before,
• check the condition of seats and mating surfaces: scratches or deposits can cause leakage even with new seals.

In round-cleaner accessories, exact fit of sliding rings and O-rings matters - a different cross-section can change sealing pressure and accelerate wear.

COMPATIBILITY

The kit is intended for servicing the Round Cleaner UFO and should be selected by MPN 138081 and by matching the dimensions of the parts with the removed components. If different round cleaner versions exist in circulation, the part number and comparison of the seals are safer than choosing “by eye”.

FAQ

Why does the kit include sliding rings if the sealing is done by the O-rings?|The sliding rings stabilize guidance of the moving part and limit side-to-side movement. When the guidance is worn, the O-rings are loaded unevenly and start leaking faster.

Does leakage in a Round Cleaner UFO always mean worn O-rings?|Not always. Deposits, scratches on mating surfaces, or worn guidance are also common causes. That is why replacing the full kit (O-rings + sliding rings) makes sense especially when the accessory has noticeable play or has seen heavy use.

Can I replace only one O-ring if it leaks “on one side”?|Technically, sometimes yes, but in service practice the full set is usually replaced to avoid reopening the accessory shortly afterward. Differences in wear between sides are often small.

What should I do so the new seals do not start leaking after the first use?|Thoroughly clean the seats, remove deposits, and check for burrs. Many “new leaks” result from dirt or an O-ring being pinched during assembly, not from seal quality.

How can I tell that a sliding ring is worn?|After disassembly, visible wear marks, dulling, and a “step” on the working surface can be seen. In operation, this shows up as play and uneven movement of the guided part, often together with leakage.

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