Waterco Trimline MkII Cartridge Filter Tank Lid O-Ring - 221mm - 62021

Waterco Trimline MkII Cartridge Filter Tank Lid O-Ring — 221mm

Genuine Waterco tank lid o-ring, part number 62021, sized 221mm to match the MkII lid. This is the seal between the lid and the filter body on the earlier Trimline MkII cartridge filter — the part to replace when water weeps or sprays from around the lid, or when the lid will not hold pressure after servicing.

Specifications

Part Number	62021
Manufacturer Description	Lid O-Ring MK2
Size	221mm — matches the MkII lid outside diameter
Brand	Waterco
Suits Lid	62020 — MkII lid, 221mm outside diameter
Quantity Per Filter	1

MkII or MkIII? Measure the Lid

This o-ring is for the MkII only. The MkIII uses a different, smaller seal and the two are not interchangeable. The quickest way to tell them apart is the lid diameter:

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

Some suppliers list a single o-ring as suiting both the MkII and MkIII. Waterco do not — they specify separate part numbers. Measure across your lid before ordering, or send us a photo of the filter and the lid.

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 Parts

• 62020 — MkII lid, supplied with o-ring
• 62026 — MkIII lid o-ring, 214mm
• 62024BLK — Lid lock ring
• 620221 — Air release valve, MkII and MkIII
• 620341 — Union o-ring, 40/50mm MkII

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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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