One small thing the makers seemed to have settled upon is standardization of the hose and reservoir connectors, actually extending it to filter cartridges (at least in the case of Sawyer).

If it looks like this one, then it's standard.

CamelBak Quick Link

Pro tip: find and carry a spare o-ring. The connection leaks like a sieve if it's ever lost.

Cheer,
_________________________
--Rick