Aladdin O-486-0 25 in. System:3 Filter Tank O-Ring – 24850-0009
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Correct 25-Inch Tank O-Ring for Select Sta-Rite System:3 Filters
- Aladdin O-486-0 replacement tank O-ring for the 25-inch System:3 filter platform.
- Verified fitment includes Sta-Rite/Pentair System:3 models S8M150, S8D110, and S8S70.
- Replaces Pentair/Sta-Rite part number 24850-0009.
- Seals the main filter tank joint when the correct 25-inch System:3 configuration is used.
- Aladdin replacement part; not a Pentair OEM-branded O-ring.
Quick Product Summary
The Aladdin O-486-0 is the replacement tank O-ring used on select 25-inch Sta-Rite/Pentair System:3 pool filters. Aladdin lists this part for System:3 models S8M150, S8D110, and S8S70 and identifies Pentair/Sta-Rite 24850-0009 as the corresponding OEM reference number.
This is the large tank sealing O-ring used at the filter body joint. It is intended for the larger 25-inch System:3 configuration, so model verification matters before ordering. Similar System:3 filters use different tank O-rings; for example, the smaller 21-inch S7-series configuration uses a different part number.
If a System:3 filter is leaking at the main tank seam, the tank O-ring should be inspected for flattening, cuts, distortion, debris, or incorrect seating. A damaged or incorrectly installed tank seal should be replaced with the exact part specified for the filter model rather than selecting an O-ring based only on appearance.
Best For
Servicing the main tank seal on Sta-Rite/Pentair System:3 S8M150 modular media, S8D110 D.E., and S8S70 sand filter models when the parts diagram calls for 24850-0009 / O-486.
Why Exact System:3 Fitment Matters
- Matches the 25-inch System:3 tank application identified by Aladdin.
- Provides a direct aftermarket replacement reference for Pentair/Sta-Rite 24850-0009.
- Helps avoid confusing the larger S8-series tank seal with other System:3 O-rings.
- Useful for leak repair or preventive seal replacement when the filter tank is opened for service.
Common Signs / Use This When
- Water is leaking from the main filter tank seam.
- The existing tank O-ring is flattened, cut, stretched, distorted, or missing.
- The filter has been opened for internal service and the old seal no longer seats correctly.
- Your model or parts diagram specifies Pentair/Sta-Rite 24850-0009.
Product Specifications
| Specification | Details |
|---|---|
| Brand | Aladdin Equipment Company |
| Aladdin Part Number | O-486-0 |
| UPC / Barcode | 601402254345 |
| Product Type | Filter tank O-ring |
| Application | 25-inch System:3 filter tank |
| Verified Models | S8M150, S8D110, S8S70 |
| OEM Reference | Pentair/Sta-Rite 24850-0009 |
| Manufacturer | Pentair / Sta-Rite application |
| OEM Status | Aftermarket Aladdin replacement part |
Compatibility / Fitment Notes
Aladdin specifically lists O-486-0 for the 25-inch System:3 S8M150, S8D110, and S8S70 models. It should not be treated as a universal System:3 or System 2 filter O-ring. Verify the exact filter model and parts diagram before ordering.
The corresponding Pentair/Sta-Rite reference is 24850-0009. Other System:3 sizes and models can use different tank seals.
Installation / Use Notes
Shut the circulation system off and fully relieve filter pressure before opening the tank. Remove the old tank O-ring, clean the O-ring groove and mating surfaces, inspect for damage or debris, and install the replacement seal without twisting or pinching it.
Reassemble the filter according to the manufacturer’s instructions and verify the tank closure hardware is correctly positioned before restarting the system. Check the tank seam carefully for leaks after startup.
Buy with Confidence
Benchmark Pool Supply helps customers match filter seals by exact model and manufacturer reference number. O-486-0 is specifically tied to the larger 25-inch System:3 S8-series application, so checking the model number before ordering helps prevent confusing it with other System:3 tank O-rings.
Frequently Asked Questions
What filters does Aladdin O-486-0 fit?
Aladdin lists O-486-0 for 25-inch System:3 models S8M150, S8D110, and S8S70.
What Pentair or Sta-Rite part does O-486-0 replace?
Aladdin identifies Pentair/Sta-Rite 24850-0009 as the OEM reference for O-486-0.
Does O-486-0 fit Sta-Rite System 2 filters?
Aladdin’s current product information identifies O-486-0 for specific 25-inch System:3 models, not as a universal System 2 filter seal.
Is O-486-0 the same tank O-ring used on every System:3 filter?
No. System:3 filters use different tank O-rings depending on model and tank size. Match the exact model and part number before ordering.
When should I replace the System:3 tank O-ring?
Replace it when it is cut, flattened, stretched, distorted, missing, or no longer seals the tank joint correctly. Always depressurize the filter before opening it for inspection or service.
