Waterlock size calculator (VETUS)
The formula includes a safety factor as shown in the VETUS diagram.
Formula used (from catalogue)
Required waterlock capacity (L) =
2 × (π/4 × D² × L) × 0.25 ÷ 1,000,000
D in mm, L in mm. “2×” = safety margin, “0.25” assumes ~25% water in the hose.
2 × (π/4 × D² × L) × 0.25 ÷ 1,000,000
D in mm, L in mm. “2×” = safety margin, “0.25” assumes ~25% water in the hose.
How to use the result
This tool lists all suitable waterlocks that match the selected hose Ø and have
capacity ≥ required. Final choice depends on space, installation layout, noise, and preference.
Note: This calculator verifies hose diameter and minimum capacity only.