The flow rate of Sawyer PointONE filters have been thoroughly tested at different altitudes with different size containers and different length hoses.
The flow rate of a filter is determined by a combination of things including head pressure (the distance from the top of the water to the filter), altitude (the higher the altitude, the slower the flow rate), and how clean the filter is.
A longer hose, a larger container, and keeping the container constantly full versus going from full to empty can all improve the flow rate.
For instance, a Sawyer PointONE filter on a 5-gallon bucket with a 3-foot hose running from full to empty at sea level will provide an average of clean water at 1.22 liters a minute (73.5 liters/19.4 gallons an hour). If the same bucket is kept constantly full, the flow rate increases to 1.3 liters a minute (78.2 liters/22.2 gallons per hour or 533 gallons in a day). Increase the container size to a 55-gallon drum, and just one Sawyer PointONE filter can give 629 gallons a day.
PointONE Filter flow rate summary (U.S.) ( PDF)
PointONE Filter flow rate summary (metric) ( PDF)
Full Sawyer PointONE Filter flow rate report (U.S. & metric) ( PDF)