Finally, fill the pour tray with chilly water then allow the pour tray to totally drain into the pitcher. The point is usually that when your filter senses that it's nearing the 40-gallon mark or even the 60th working day, it activates the LED to show a unique light-weight colour. https://purwaterfilterblinkingred86307.angelinsblog.com/18320323/the-basic-principles-of-pur-water-filter