Measure the feedwater temperature, the temperature should not vary more than +/- 1°C (34°F) during the duration of the test.
2. Remove any entrained air from the filter holder housing by either opening the bleed valve or loosening the filter holder (depending on
the model used) while slightly opening the ball valve. Once the air has bled from the housing, close the bleed valve or the filter housing.
3. Place a 500 ml (17 fl oz.) graduated cylinder under the filter housing to collect the volume of water that passes through the filter pad.
4. Fully open the ball valve and measure the time required (use a good quality stopwatch) to collect 100 ml (3.4 fl oz.) and 500 ml (17 fl
oz.).
5. After five minutes, repeat the test. As before, measure the time required to collect a 100 ml (3.4 fl oz.) sample and a 500 ml (17 fl oz.)
sample. Record the time intervals with the flow continuing to run through the filter housing.
6. Repeat the test at the 10-minute interval and again at the 15-minute interval.
7. If the time required to collect a 100 ml sample is greater than 60 seconds, plugging will be about 90% and it will not be necessary to
continue the test.
8. After the 5, 10 and 15-minute samples have been collected, measure the water temperature to confirm that the temperature has not
varied by more t