Most HydraPak products work with a filter. Which one depends on how the filter connects: inline on a drink tube, or screwed directly onto a bottle's threaded opening.
Inline filters (reservoirs and drink tubes)
All HydraPak reservoirs work with inline filters.
- HydraPak 28mm Inline Filter: clicks into any Plug-N-Play fitting. No cutting needed.
- Other brands (Sawyer Mini, Sawyer Squeeze with Sawyer's inline adapter, Platypus GravityWorks, MSR Thru-Link): cut the drink tube with scissors and push each end onto the filter. Place it near the reservoir, over your shoulder, or at the end of the tube in place of the bite valve.
Filters that screw directly onto a bottle
| Thread size | Found on | Compatible filters |
|---|---|---|
| 28mm | Stow 500 ml and 1 L (2020 and newer, with "Filter Compatible" icon) | HydraPak 28mm Inline Filter, Sawyer Mini, Sawyer Squeeze, LifeStraw Flex, HydroBlu Versa Flow |
| 42mm | Flux bottles, Stash 750 ml, Seeker, SkyFlask | HydraPak 42mm Filter Cap, Katadyn BeFree, Salomon XA Filter Cap |
| 42mm | Ultraflask, Softflask | HydraPak Ultraflask + Filter Cap |
| 63mm | Breakaway Squeeze Bottle | HydraPak Breakaway+ Filter Cap |
Using a Sawyer Squeeze with 42mm products or reservoirs
- Seeker, Flux, UltraFlask, SkyFlask (42mm): use a filter adapter with a Plug-N-Play top cap.
- Reservoirs, Inline Connector, Expedition 63mm cap (Plug-N-Play): use the HydraPak 28mm filter adapter.
Purification tablets
Only the Recon (hard plastic) is compatible with iodine or chlorine tablets. Don't use tablets in reservoirs, SoftFlasks, Seekers or other soft TPU products. Iodine and chlorine can break down the material. Use them in a soft product only in a backcountry emergency.
New to treating water outdoors? Read our Hydration 101 blog.