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Water treatment/ CALCULATOR

Filter-media contact time

Estimate empty-bed contact time and hydraulic surface loading for a cylindrical media vessel.

Use the actual occupied media volume, not total vessel volume.
Use the flow through this vessel during treatment.
Use the internal diameter across the media bed.
Empty-bed contact time

5.00 min

Hydraulic surface loading

8.49 m/h

Uniform flow through a cylindrical media bed with no bypass or channeling. Manufacturer limits, pressure loss, water chemistry, media kinetics and backwash requirements govern actual selection.

Continue your calculation

Water treatment

Filter service-life planner

Turn a rated treated-water capacity into a conservative replacement date estimate.

Water treatment

UV intensity × exposure time

Show the unit relationship between ultraviolet intensity, exposure time and nominal dose.