Nozzle orifices are tiny, so scale builds up gradually. By the time the fog looks coarse, the deposit has been there for months.
Quarterly checks
- Fog pattern: uneven spray means a problem
- Pre-filter: replace when differential pressure rises
- Sample nozzles: inspect for scale
- Fittings: leaks only grow under pressure
Cleaning
Follow the data sheet. Never poke the orifice with a hard tool — once deformed, the spray angle changes permanently.
