I picked one of these up on Amazon for around $50, wanting to try an inline filter on my hydration pack. I’m pretty happy with it thus far. It was super easy to get it set up with my Hydrapak bladder (the fittings are compatible). Easy to put in and take out.

It takes some extra effort to drink from, but it’s workable for me. I have only used it on pretty good/clear water sources. There’s no carbon filter like many pumps have, so taste won’t be improved by it. Again, not an issue for the water I’ve used.

It’s a great option to have for ultra-light trips and racing. Much quicker to just fill up than spend time pumping. I’m grown suspicious of sodium pills (such as from Katadyn) over the years — think they might contribute to stomach issues. So this is a good way to avoid them (even though I carry some as backup).

I’d recommend this, for sure.

This has been a great piece for me! I use one as an inline filter for a 1L smart water bottle that sits in the bottom of my framebag. The bottle is along the downtube and the filter fits right above it into the headtube/downtube/toptube junction. It makes filling up a breeze; I usually carry another 1L bottle under my downtube and just switch the bottles out as one empties. Saves a whole mess of time at water stops. No pumping, waiting, swishing, etc. Just fill and go. And, I’ve used it on some pretty questionable water as well with no ill affects; the small flow through cowpie heaven at Hwy 114 on the Colorado Trail comes to mind. Highly recommended.

I’ve had the gravity drip version of this filter for a couple of years now. It worked great the first few times I used it. Unfortunately when I tried to use it again just recently it wouldn’t filter at all – not one drop! I went through the back flush process and was able to get it to working again, but only barely. It takes something like 10+ minutes to filter a liter of water now. I’m bummed!

I have modified one of these with quick connect fittings to make a 4L gravity filter. Has been flawless for one year now. I always back flush after every use. No slow down in volume. Using a coffee paper filter or bandana as a prefilter is also a good idea. Lots of sediment I don’t see until I look at my prefilter.

Platypus 4l bag receives clean water and a cheap ebay 2L bag for the unfiltered. Thinking about adding a tiny home made charcoal filter after the sawyer for taste.

I can fill 4L in about 15-18 mins. Or faster with a longer tube.