Free calculator
Calculate vessel diameter, filtration rate, media volume and backwash flow from flow and filter type.
Results update instantly as you type.
Results are for preliminary sizing; the final design is based on water analysis and a site survey.
Area = flow / filtration rate (10–15 m/h for multimedia, 8–12 m/h for carbon and catalytic media). Backwash at 25–35 m/h for sand and 15–25 m/h for carbon. Media volume = area × bed depth.
Recommended systems
Layered anthracite, quartz sand and gravel filter — the pre-treatment before softening and reverse osmosis.
Removes chlorine, odour, colour and organics; protects RO membranes from chlorine.
Guaranteed turnkey replacement of sand, carbon, resin, iron-manganese and arsenic media.
Free site survey & water analysis
We survey your site and analyse your raw water, then present the system that fits your needs and budget in a technical report.
