I am working on a new filter set up for backpacking with several people. It consist of a 3L CNOC bag for dirty water then a Sawyer Squeeze then a Sawyer 28mm adapter and another 3L CNOC bag for the clean water to flow into. It works well. I now want to find a 28mm shut off valve so that I can take the clean bag and hang it up with a valve to fill up cups and bottles on demand.

Can anyone help source a 28mm shut off valve to use on the clean bag??

Thanks!