Waterco Trimline MkIII Cartridge Filter Tank Lid O-Ring - 214mm - C25, C50, C75, CC50, CC75, CC100 - 62026

Waterco Trimline MkIII Cartridge Filter Tank Lid O-Ring — 214mm

Genuine Waterco tank lid o-ring, part number 62026, sized 214mm to match the MkIII lid. This is the seal between the lid and the filter body on Trimline MkIII cartridge filters. It is the part to replace when water weeps or sprays from around the lid, or when the lid will not hold pressure after servicing.

Listed as item 4 in Waterco's Australian Trimline cartridge filter manual.

Specifications

Part Number	62026
Manufacturer Description	Lid O-Ring MK3
Size	214mm — matches the MkIII lid outside diameter
Brand	Waterco
Diagram Reference	Item 4 — Trimline cartridge filter manual
Barcode	9314800098794
Quantity Per Filter	1

Fits

Waterco Trimline MkIII cartridge filters:

• Trimline C25, C50, C75
• Trimline CC50, CC75, CC100, CC150

Waterco also list 62026 as the 8" top lid o-ring for their side mount sand filters, so the same seal is used on some Micron and SM series tanks.

MkII or MkIII? Measure the Lid

This o-ring is specified for the MkIII only, and the two versions are not interchangeable. The quickest way to tell them apart is the lid diameter:

• MkIII lid — 214mm outside diameter — lid o-ring 62026 (this part)
• MkII lid — 221mm outside diameter — lid o-ring 62021

If you are not certain which version you have, send us a photo of the filter and a measurement across the lid before ordering.

Fitting

Shut the pump down and release tank pressure at the air bleed before removing the lid. Clean the groove and the sealing face, then fit the o-ring and give it a light smear of silicone-based o-ring lubricant. Do not use petroleum grease — it swells and degrades the rubber. Seat the o-ring fully before refitting the lid and lock ring, and re-pressurise slowly while checking for leaks.

Related Trimline MkIII Parts

• 620260 — MkIII lid o-ring in Viton, for salt and high-sanitiser installs
• 62025 — MkIII lid, supplied with o-ring
• 62024BLK — Lid lock ring, 52mm high
• 620221 — Air release valve
• 122257BLK — 40/50mm half union, MkIII post-2001

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Manufacturer Manuals, Diagrams & Part Numbers

Need exploded views, spare part numbers, diagrams, or more product information? See Waterco's Trimline Cartridge Filter manual.

Important Before Ordering: Please ensure you order correctly. Confirm this product is suitable before ordering. Use the manual above, seek professional assistance, or contact us with photos of your existing part, model details, serial numbers, and any labels.

As with all products, these must be diagnosed and fitted by a qualified and experienced person.

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