Water Hardness, Scale, and Your Pot Washer’s Lifespan
Hard water is a pot washer’s slow enemy: dissolved calcium and magnesium precipitate as scale on heaters and jets, cutting efficiency and shortening life. Keeping feed-water hardness below 5 °dH — or fitting a softener above it — protects the 15 kW booster and the spray nozzles.
How scale forms
When hard water is heated, calcium and magnesium drop out of solution and crust onto the hottest surfaces — exactly where the heaters and rinse jets are. Scale insulates heaters and narrows nozzles.
The 5 °dH threshold
Below about 5 °dH, scaling is slow and manageable with routine descaling. Above it, a softener pays for itself by protecting the booster heater and keeping rinse coverage even.
Maintenance habits
Descale on schedule, inspect jets for partial blockage, and watch for rising cycle times — an early sign of scaled nozzles.
- Scale targets the hottest parts: heaters and jets.
- Keep hardness < 5 °dH or fit a softener.
- Rising cycle time signals scaled nozzles.