Quick take
Waterdrop currently lists G3-N1CF for up to six months or 550 gallons, with a one-time price of $29.99.
Compatible systems
Waterdrop identifies G3-N1CF for G3-family reverse-osmosis systems including G3P600 and G3P800.
Life and capacity
The current published limit is up to six months or 550 gallons, depending on water conditions.
Current price
Waterdrop currently lists G3-N1CF at $29.99 one-time, with lower subscription pricing shown on some system pages.
Do not confuse the three G3P800 filters
G3-N1CF is the first-stage CF cartridge. G3-N3CB and G3P800-N2RO are separate consumables with longer intervals.