Choose your system and enter the number of components. The capacities are Judex’s working estimates; change a value if the actual operating volume is known.
RT-DFT retained water
Enter the length of one horizontal pipe on each level. This estimate assumes one pipe per level and water retained to half the pipe depth. Use the measured inside diameter if available.
Estimated water retained in RT-DFT: 0 L
WORKING DOSE FOR THE SELECTED PRODUCTCalcium nitrate
1,920 ÷ 1,000 × 25 = 48 g
For the IBC reference, the 500 L sump is Judex’s planning assumption even when its actual operating level is lower. His familiar approximately 2,000 L reference gives 50 g.
The RT-DFT estimate assumes horizontal pipes half full. The 106 mm default is Judex’s measurement of one nominal 110 mm pipe; check the pipes on the installation. Add measured water in filters or other pipework to “Other measured operating water” if relevant. This calculator gives a dose for the selected product only; it does not direct you to add all four together or decide when an addition is needed. Follow Judex’s water-test and dosing guidance.
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