Calculators
Know what you need for your job
Size the drain field, correct for slope, and estimate backfill sand and panels before you order.
Design Calculator
Enter the daily design flow and LTAR to get T&J trench linear feet, bed area and dual alternating trench lengths.
Slope Correction Calculator
Correct line lengths for sloped sites.
Backfill Sand Calculator
Enter the total linear feet to estimate the tons of backfill sand the job needs.
Panel Calculator
Enter an individual line length to get the number of panels, spacing and feet of PVC for horizontal or vertical installs.
Results are estimates. Confirm your design with the design tables, the installation manual and your permit.