Find the exact hot tub filter. With receipts.
Type the number on your old cartridge's end cap — OEM, Unicel, or Pleatco — and get the matching equivalents, size, fittings and the catalog page it came from.
Browse by brand
- Hot Spring11 cartridges · 5 fully cited
- Hot Spot1 cartridges · 1 fully cited
- Caldera9 cartridges · 7 fully cited
- Jacuzzi12 cartridges · 6 fully cited
- Sundance17 cartridges · 11 fully cited
Popular guides
- How often should you replace a hot tub filter?
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- How often should you clean a hot tub filter?
- How to find your spa filter size
- OEM vs Unicel vs Pleatco spa filters: what’s the difference?
- Signs your hot tub filter is bad (and needs replacing)
How this works
Cross-referenced
Spa makers, Unicel and Pleatco number the same cartridge differently. We match them using the published tables.
Cited sources
Every row links the catalog page, and anything unconfirmed is clearly flagged so you can check it yourself.
Measure to confirm
No readable number? Use the measuring guide or size lookup.