Pentair Onga Leisuretime II Filter Neck / Valve-to-Tank O-Ring (Part 02011134)

Genuine Pentair Onga Leisuretime II Filter Neck / Valve-to-Tank O-Ring — part no. 02011134. This large rubber O-ring seals the multiport valve to the filter tank neck on Onga Leisuretime II (LSFII) media sand filters. A worn or cracked O-ring causes water to leak from the joint between the multiport valve and the filter tank. Replacing this O-ring restores a watertight seal.

Compatibility

• Pentair Onga Leisuretime II / LSFII Media Filter
• Model LSFII21-40
• Model LSFII25-40
• Model LSFII25-50
• Model LSFII28-50

Product Details

• Brand: Pentair Onga
• Part number / SKU: 02011134
• Outside diameter: 170mm
• Material: rubber
• Genuine Pentair Onga spare part

Frequently Asked Questions

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

If water is leaking from the joint between the multiport valve and the top of the filter tank, the filter neck O-ring is the most likely cause. Turn off the pump and relieve system pressure, then remove the multiport valve and inspect the O-ring for cracks, flattening, or deformation. Even if the O-ring appears intact, replace it if it has been in service for several years or if any leak is present at this joint.

Is this the same as the multiport valve lid O-ring?

No — this is the filter neck / valve-to-tank O-ring (part 02011134), which seals the multiport valve to the filter tank. It is a different O-ring from the valve lid or spider gasket. If you are unsure which O-ring is leaking, identify the location of the leak 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 and extends its service life. Do not use petroleum-based lubricants as these degrade rubber O-rings.