Prevent scale, corrosion, and tool fouling. Local DI tank exchange service designed for Ontario machine shops — no tariffs, transparent pricing, fast support.
Request a Service AssessmentMunicipal tap water in the GTA typically has 200–400 ppm dissolved minerals. Run that through a cooling system and those minerals deposit as white scale on heat exchangers, spindles, and internal passages — reducing flow, transferring less heat, and shortening equipment life.
Calcium and magnesium in tap water react with metalworking coolant to form soaps that cloud the fluid, reduce lubricity, and encourage biological fouling in the sump. DI water extends coolant life significantly and keeps your sump cleaner.
Electrical discharge machining (EDM) uses water as a dielectric. Resistivity directly affects the discharge characteristic — and therefore cut quality and dimensional accuracy. EDM water typically needs to be in the 1–5 MegOhm range. Tap water or softened water cannot meet this spec.
Rinsing finished parts with tap water leaves water spots and mineral deposits that require additional cleaning before inspection, plating, or coating. A final DI rinse leaves no residue — saving labour and preventing coating adhesion failures.
| Application | Recommended Resistivity | Typical Tank Type |
|---|---|---|
| Coolant mixing water | 0.1 – 1 MegOhm | Mixed-bed or cation/anion series |
| Machine washdown / part rinse | 0.5 – 2 MegOhm | Mixed-bed |
| EDM (wire & sinker) | 1 – 5 MegOhm | Mixed-bed polisher |
| Final rinse before coating/plating | 1 – 18 MegOhm | Mixed-bed polisher |
Not sure what your application needs? Ask an engineer at Eclipse →
We review your water usage, feed water quality (TDS), purity target, and any existing treatment equipment. This tells us the right tank size and service frequency for your shop.
A freshly regenerated DI tank is delivered to your facility and connected to your supply line. No capital investment, no chemical storage, no on-site regeneration equipment needed.
About the tank exchange service →You monitor outlet resistivity with a simple inline meter. When quality approaches your minimum threshold, you schedule a swap. Eclipse picks up the exhausted tank and delivers a fresh one — same day in the GTA.
How often do tanks need exchanging? →Flat per-swap or monthly rates. No fuel surcharges, no hidden freight fees, no U.S. tariff exposure. All regeneration is done locally in Ontario.
See typical pricing ranges →Why do CNC machine shops need deionized water?
CNC coolant systems, EDM machines, and part washdown lines all suffer from mineral deposits when tap water is used. DI water has no dissolved ions — no scale, no corrosion, and no coolant contamination from hardness minerals.
What resistivity do I need for EDM?
EDM machines typically require 1–5 MegOhm. Wire EDM manufacturers often specify minimum resistivity in their manuals — check your machine specs or ask us to verify. A mixed-bed DI tank reliably meets this target.
Can I use softened water instead of DI water?
Softened water prevents hardness scaling but still contains sodium and conducts electricity. For EDM or final rinsing before coating, softened water is not sufficient. For coolant mixing, softened water is better than tap but not as effective as DI.
How much does DI water service cost for a machine shop?
Most small-to-medium CNC shops in Ontario pay $150–$500 per tank exchange depending on tank size and feed water quality. See the full pricing guide →
Tell us your application and water volume — we'll recommend the right tank size and service frequency with a transparent price estimate.
Get a Free Assessment Use the Sizing Calculator