Onga Pantera PCFII Cartridge Filter Lid O-Ring (10002) – Suits Hurlcon QX & Monarch P4

Genuine Onga Pantera PCFII Cartridge Filter Lid O-Ring — SKU 10002. This rubber O-ring seals the tank lid to the filter body on the Onga Pantera Mark II (PCFII) cartridge filter. Also suits Hurlcon QX and Monarch P4 cartridge filter lids. Corresponds to item 3 on the Pantera PCFII exploded 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.

Compatibility

• Onga Pantera Mark II (PCFII) cartridge filter — tank lid
• Hurlcon QX cartridge filter — tank lid
• Monarch P4 cartridge filter — tank lid

Product Details

• Brand: Onga (Pentair)
• SKU: 10002
• Barcode: 1270567
• Position: item 3 on Pantera PCFII exploded diagram
• Material: rubber

Frequently Asked Questions

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

If water is leaking from around the tank lid on your Onga Pantera PCFII, Hurlcon QX, or Monarch P4 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 original Pantera MkI as well as the MkII (PCFII)?

No — this O-ring is specified for the Pantera Mark II (PCFII). The original Pantera MkI uses a different lid O-ring. If you are unsure which version of the Pantera 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.