9.
11.
10.
1.
Disconnect Inlet Hose from Dirty Water Reservoir and
fill reservoir with 3- 4 liters of water.
2.
Fill the rest of Dirty Water Reservoir with as much air
as possible. Roll Closure Strap 4+ times to seal.
3.
Reconnect Inlet Hose to Dirty Water Reservoir.
4.
Lay hose system on ground in front of you so that it’s
easy to view the entire Inlet and Outlet hose.
5.
Flip Dirty Water Reservoir so that its hose port is
down.
6.
Holding the rolled Closure Strap, kneel on Dirty Water
Reservoir and force water through Inlet Hose. Ensure
no air enters.
7.
Open Purge Valve to purge all air bubbles from
Purifier Cartridge.
Then close it.
8.
Open Shutoff Clamp while continuing to kneel on
reservoir. Fill Outlet Hose with water.
9.
Flip Dirty Water Reservoir over so that its hose port is
facing up.
10.
Kneel on reservoir and force ONLY air through Inlet
Hose all the way through to the Purifier Cartridge.
NOTE: Your goal is to force air against the fully
wetted hollow fibers inside the cartridge. If a fiber is
damaged, air will escape, revealing a steady stream
of bubbles in the Outlet Hose.
11.
If a steady stream of bubbles appears in the Outlet
Hose as you force the air through, we recommend
repeating this test twice to ensure accuracy. If you see
bubbles each time, your purifier is NOT SAFE.
Discontinue use and replace.
These instructions are available in other languages at www.
msrgear.com/guardian-gravity-purifier
The filter media can be damaged if dropped, or if frozen
after use. If either of these has happened, perform an
integrity check.
5. Purifier Integrity Test
