Compatible with Aladdin
O-390-9
Shaft O-Ring for HR-21, HR-25 and HR-31 Sand Filters
Our part number
If the number stamped on your failed part differs, send it over — we will confirm the match against our fitment records.
OEM numbers listed for fitment identification only.
Specifications
| Compatible brand | Aladdin |
|---|---|
| Category | Filters & Filter Parts |
| Material | EPDM rubber |
| Lead time | 15–25 days after order confirmation |
- MOQ 50 pcs · samples from 1
- Private label available
- Ships from our factory
Request wholesale quote
One request covers the whole list — no need to send them one by one.
Tiered pricing available above 1,000 pcs · OEM packaging available
Product overview
The Shaft O-Ring for HR-21, HR-25 and HR-31 Sand Filters is an aftermarket o-ring built to replace the original component in Aladdin filtration systems. In service it forms the static seal between two mating components under compression. This is a consumable in practice: rubber hardens, flattens and cracks with heat, chlorine and UV exposure, and a failed o-ring is the most common source of air leaks and drips. Ours is molded in EPDM rubber and dimensionally checked against an OEM sample before tooling is signed off.
Send us the number stamped on your failed component and we will confirm the match against our fitment records before you order. Available factory-direct from 50 pcs, with mixed cartons accepted and private-label packaging offered for volume programs.
Fits these systems
Pentair Purex Tahitian Fiberglass Sand Filter Model HR-21, 25 & 31 Parts
Not sure it fits? Send us a photo of your part and we'll confirm. Send a photo
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Sourcing questions
What is your MOQ?
50 pcs per SKU for stocked items. Mixed cartons are welcome — you can combine SKUs to reach the order minimum. Samples are handled separately: we can supply a single piece so you can verify fitment before ordering in bulk.
Can I order samples before a bulk order?
Yes. We ship samples by express before bulk production so you can verify fitment on real equipment.
What are your lead times?
Typically 15–25 days after order confirmation, depending on quantity and whether custom packaging is involved.
Do you offer OEM and private-label packaging?
Yes — custom cartons and labels, your logo molded or printed on parts, and custom molds for volume programs.
O-390-9
Shaft O-Ring for HR-21, HR-25 and HR-31 Sand Filters