challenge water

English to Italian Marketing Food & Drink Filtering jugs

FILTER AND CARTRIDGE LIFE-TIME
• XXX® cartridge: 150 liters or 1 month (what comes first).
• XXX™ filter: XXX™ blocks microplastics and suspended particles (water turbidity). The filter stops working when its hollow fibers pores are completely blocked. Tests carried out with **challenge water** with a 30 FAU turbidity indicate a life-time of 1000 Liters.

Immagino che possa essere un'acqua di prova per i test, ma non trovo nulla online.