Eden Water Technologies · Free tool

Size your reverse osmosis system

Tell us what you grow and what your feed water looks like. We'll show which model fits, roughly what it costs, and where the number could be wrong.

01 How much water do you use?

Pick whichever you actually know. A tracked peak day beats any estimate.

gallons per day

02 What does your feed water look like?

The step most sizing tools skip — and why systems come in under spec. Every GPD rating, ours included, assumes 2,000 ppm at 77°F. Colder or dirtier water makes less.

°F · wells run 55–60
ppm · from your report
lets the RO run longer

03 What's actually in your water? Optional

Three lines off your water report. Optional — but scale risk and antiscalant dose are the two things TDS alone can't tell you.

feed water pH
ppm as CaCO₃
ppm as CaCO₃
Report as CaCO₃ — most labs do. If yours gives calcium as Ca, multiply by 2.5. Leave blank and we'll still size the gear, just not the dose.
Recommended
Your peak day
gallons needed
Target with headroom
peak + 20%
Real output
at your temp & TDS
Rated output
at 77°F, 2,000 ppm
Water in, out and to drain

Check these against your own gauges. Recovery moves everything — it sets what goes down the drain and how concentrated the reject gets, which decides your antiscalant dose.

% — rated is , but that is a ceiling
GPM — leave 0 if you don't recycle

Scale control — antiscalant

Work out the actual dose

Antiscalant feeds at a few ppm — less than any pump delivers neat. So the mix sets the dose, not the pump. That is the step that goes wrong.

ppm on feed · range 1–10

Disinfection — UV

Options

First two are fitted on every build. Tick anything else you want; quoted items are priced per job and are not in the estimate.

Preliminary estimate, not a quote. List pricing and rated capacity — right size and ballpark, not a budget number. Crate and freight quoted separately. Sizing confirmed against your water report first.

Want a real quote? Send this to yourself — we'll check it against your water report, confirm sizing and price freight. No obligation, and a person reads every one.

Up to 3 files, 10 MB each. A water report is the most useful thing you can send.

Used to send your estimate and follow up. We don't sell your details or send newsletters.