Waterco Trimline MkIII Cartridge Filter Tank Lid O-Ring (62026)

Genuine Waterco Trimline MkIII Cartridge Filter Tank Lid O-Ring — part no. 62026. This rubber O-ring seals the tank lid to the filter body on Waterco Trimline MkIII cartridge filters. Corresponds to item 3 on the Trimline MkIII parts diagram. A worn or cracked lid O-ring causes water to leak from around the tank lid. Replacing this O-ring restores a watertight seal. Made in Australia.

Compatibility

Suits the following Waterco Trimline MkIII cartridge filter models:

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

Product Details

• Brand: Waterco
• Part number / SKU: 62026
• Barcode: 9314800098794
• Position: item 3 on Trimline MkIII parts diagram
• Material: rubber
• Made in Australia
• Genuine Waterco spare part

Frequently Asked Questions

How do I know if this O-ring needs replacing?

If water is leaking from around the tank lid on your Waterco Trimline MkIII cartridge filter, the lid O-ring is the most likely cause. Turn off the pump and relieve system pressure, then remove the tank lid and inspect the O-ring for cracks, flattening, or deformation. Replace if any damage is visible, or as part of routine filter servicing.

Does this suit the Trimline MkI or MkII as well?

No — this O-ring is specified for the Trimline MkIII only. The MkI and MkII use different lid O-rings. If you are unsure which version of the Trimline filter you have, check the model label on the filter body or contact us before ordering.

Should I lubricate the O-ring when fitting it?

Yes — apply a small amount of silicone-based O-ring lubricant (not petroleum-based grease) to the O-ring before fitting. This helps the O-ring seat correctly in the lid groove, prevents pinching, and extends its service life.