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Calculate the on site permeable pavement surface infiltration rate based on ASTM C1781. For reference of how to perform this test click here.

Measurement Option
Test Metrics

Enter either 8lbs3,6kg or 40lbs18kg water weight as per test procedures

Water Weight
Enter Infiltration Ring Diameter (in)(mm)

Surface Infiltration Time


No calculation added yet. Calculation results will show up here.

Input Information
Water Weight lbskg
Infiltration Ring Diameter inchesmm
Surface Infiltration Time
Surface Infiltration Rate inches/hourmm/hour

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DISCLAIMER: This test should be performed in accordance with the standards set out in ASTM C1781. Unilock accepts no responsibility in the methods, execution or results of the test. Contact your local representative for more detailed information for your project.

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