Kelly C.wrote a review of MSR In-Line Shut-Off Valve on April 4, 2019
Familiarity: I've used it once or twice and have initial impressions
I bought 4 to use with my Platypus Hoser bladders. I wanted to use them before the quick connect fitting coming from the bladder, but these valves are made to go into the MSR hose and then the MSR bite valve. The Platypus bite valve slips on the end, but the fit is rather loose in my opinion. I think I would end up losing the bite valve at some point. I think I will still be able to use them, but I will have to do a little hose modification.