Astral Viron CL Cartridge Filter Lid O-Ring (1005501) – Suits CL400 & CL600

Genuine Astral Viron CL Cartridge Filter Lid O-Ring — part no. 1005501. This large O-ring seals the lid to the filter body on Astral Viron CL 400 and CL 600 series cartridge filters. A worn or cracked lid O-ring causes water to leak from the top of the filter. Replacing this O-ring restores a watertight seal and stops the leak.

Specifications

• Diameter: approximately 480mm
• Thickness: 5mm
• Material: heavy-duty chemical-resistant rubber

Compatibility

• Astral Viron CL 400 Series Cartridge Filter
• Astral Viron CL 600 Series Cartridge Filter

Product Details

• Brand: Astral Pool
• Part number / SKU: 1005501
• Barcode: 9343609060404
• Genuine Astral Pool spare part

Frequently Asked Questions

How do I know if the lid O-ring needs replacing?

If water is leaking from around the filter lid when the pump is running, the lid O-ring is the most likely cause. Remove the filter lid and inspect the O-ring for cracks, flattening, cuts, or deformation. Even if the O-ring appears intact, if it has been in service for several years it may have lost its elasticity and should be replaced as a precaution whenever the filter is opened for cartridge cleaning or servicing.

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 groove, prevents pinching or rolling during lid installation, and extends the O-ring’s service life. Never use petroleum-based lubricants as these degrade rubber O-rings over time.

Is this a genuine Astral part?

Yes — part 1005501 is a genuine Astral Pool spare part, not an aftermarket substitute. Using a genuine O-ring ensures correct dimensions and chemical resistance for pool water conditions.