This is a Nature 2 cartridge. It will leak until you replace the cartridge, which isn't a good thing.
If you search the Forum, you'll find that it will: add metals to your pool that you don't need, not
do any of the things promised to keep your water "cleaner with less chlorine" and cost you a
ridiculous amount to replace the cartridge 2x a year. I think it's why the convenient "leak feature"
was added!
I had one for many years until I found TFP. I had the cartridge completely removed and had a
PVC piece added to patch the hole. I don’t miss it AT ALL. My pool looks great and I get to
save over $150+ annually.