CHPro Chemical › Guides › Commercial warewashing & water hardness: a practical guide
Spotty glasses, filmy plates, and rising chemical bills usually trace back to one overlooked factor: water hardness. Here's how it affects commercial warewashing and how to get consistently spotless results.
Hard water is high in dissolved minerals. Those minerals react with detergent (reducing its effectiveness, so you use more) and deposit as scale and spots on ware and inside the machine. Metro Vancouver's water varies by area, so what works at one site may underperform at another.
Matching your detergent and rinse aid to your local water hardness is the single biggest lever for spot-free results and controlled chemical costs.
Watch for white spots or film on glassware, scale buildup inside the dish machine, and detergent use creeping up over time. These are all symptoms of hardness that the right chemistry (and sometimes a water treatment step) can solve.
High-temp machines sanitize with heat (a hot final rinse) and pair with a matching detergent and rinse aid. Low-temp machines sanitize chemically (usually chlorine) in the final rinse, so the sanitizer is part of the program. The chemistry differs — the machine type determines what you should be running.
Detergent removes soils; rinse aid breaks water's surface tension so ware sheets off and dries without spots; sanitizer (in low-temp machines) does the final kill step. Skipping or under-dosing any one shows up on the plate.
Getting all three matched to your machine and water — and dosed by installed dispensing rather than by hand — is what makes results consistent shift after shift.
Spotting is usually caused by hard water and/or insufficient rinse aid. Matching the detergent and rinse aid to your water hardness — and dosing them correctly — resolves most spotting.
High-temp machines sanitize with a hot final rinse; low-temp machines sanitize chemically (usually chlorine) in the final rinse. Each needs a different chemical program.
Yes — CHPro tunes the detergent and rinse aid to your local water hardness and machine, and installs dispensing so the dose stays consistent.