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The maximum inlet pressure that the float valve could resist was determined. Float orientations of 90, 45 and zero degrees all resisted a pressure of at least 8m. A float orientation of zero degrees resisted pressures of at least 11m. All of the float orientations have a maximum inlet pressure well above the 2m needed for the AguaClara plants.
This data was further analyzed to also determine the amount of variation in flow controller level with increasing pressure build up on the float valve.
The level in the module changed by many centimeters during the experiment, but this was over the entire range of inlet pressure build-up. For the range that is pertinent for designing AguaClara plants, up to at most 2m, the level changed in the flow controller much less. The table below shows the total change in flow controller water level at both the highest back pressure reached, and at approximately 2m of pressure.
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