Part # 152127
Pentair® Nautilus® Stainless Filter Tank O-Ring – 152127
✅ Genuine Pentair® OEM Replacement O-Ring
⚠️ Fits Nautilus® NS Filters Only (After 2001)
❌ Not for Nautilus® NSP Series Filters
Key Features
✅ Creates watertight seal between stainless steel tank sections
✅ 18" O-Ring with 18-1/2" inside diameter
✅ Cross section: 7/16"
✅ Heavy-duty rubber compound resists pool chemicals and pressure cycles
✅ Essential for safe, leak-free filter operation
System Compatibility
✅ Pentair® Nautilus® Stainless Steel (NS) Filters – manufactured after 2001
⚠️ Will not fit pre-2001 Nautilus® tanks; check part diagram before ordering
❌ Not compatible with Nautilus® NSP Series Filters
Recommended Accessories
⚠️ Filter Clamp Assembly & Hardware – inspect and replace if corroded
⚠️ Silicone-Based Pool Lube – apply to O-ring for proper sealing
❌ Reusing old, flattened O-rings may cause leaks and pressure loss
What’s Included
✅ 1 x Pentair® Nautilus® Stainless Filter Tank O-Ring (152127)
Tech Tips
✅ Lubricate Before Install: Use silicone-based lube to extend life and improve seal.
⚠️ Check Seating Surfaces: Clean groove before installing new O-ring.
✅ Inspect Annually: Replace at first signs of wear, cracks, or flattening.
❌ Do Not Over-Tighten Clamp: Excess pressure can pinch or distort the O-ring.
Generic Part # 90-423-1184
I ordered the Nautilus Stainless Filter Tank O-Ring. It was the OEM version (152127) which had a premium price compared to the regular generic O-Ring. I received the generic version which is round and does not have the flat sides that sit on the ledge of the tank. So how do I get the correct one I paid a premium price for and return this one?
Reply
Hi, Skip. Thank you for bringing this matter to our attention. Yes, you did order an OEM product, if you received something different, please provide a picture of the item that you received including the packaging with the item number and description. This o-ring you ordered is completely round with no flat sides. These o-ring can become flatten over time since they are compressed between the Lid and bottom assembly. Again, get us a picture of what you received so that we can resolve this for you.
Reply
The "O" ring that came originally was flat on the inside. It fit perfectly. I have not been able to find one. the ones they sell now are just a bit too big and getting them on is tricky plus they push out by the coupling ends when you tighten them down.
Reply
Hi I have a stainless heldor de36 grid type filter
The website directs me to this part # 152127
Could you please make sure that this is the correct part ... Thank you
Reply
Hi, Don. This Tank O-ring can be used with a stainless steel Heldor Clearflo D.E. filter. If that is the model you have, this tank o-ring will fit.
Reply
