Platypus 2 liter with a Sawyer water filter leaking!

Different thread size is the issue.

Yeah, I did some research on what water bag would work with the Sawyer filter and most people said that the Platypus 2L would be compatible with it. Didn't work for me though, sad to say.

o n m …

Evernew bags are compatible.

Thank you, Ken! Will try that out!

As Ken said, Evernew bladders will work. I think some older platypus bladders had a compatible thread pitch. Newer platypus bladders will leak.

I plan on ordering it from amazon. Do you think it will be more reliable than the Sawyer bag?

Some of my Platy bottles seem to work fine, some of the time, but you need to be very careful when screwing the filter on. Overall I don't consider it a reliable combo.

I have had no issue with my Evernew bags.

And yes, older Platy threads are also compatible. But those are old now.

I thought I read here that the older-older Platypus bladders fit, more recent ones didn't, and the newest ones did again? My 2013 1L bags have a fine seal, and I don't overtighten. I've seen so much back and forth about this, we need a definitive answer.

Can't help there. Never bought Platys. Platy would be smart to match threads.

People seem to report mixed results with this setup. I've gotten a new and old Platy to seal up, but I don't use it as I don't trust the thread strength.

Key point here, is that it isn't the threads that seal, it's the gasket inside the Sawyer that seals against the mouth of the bladder. The threads just hold the mouth tight to the gasket.

If the threads will marry, and they will tighten down well enough to create a firm seal between the mouth and the gasket, and the face of the mouth is clean and smooth, then brand is irrelevant.