How often do I have to replace filters?

Depends upon usage, but I replace once per year the ones they suggest every sixmonths. Two in family and only use for drinking water, ice maker and auto coffee makers.One of the best decisions we made. Jack C.

Is there a shelf life for these filters

Replacement Cartridges Essential filter package: 1-year filter supply #F7-GAC Best valued filter package: 3-year filter supply #F22-75 1st Stage: Sediment Filter, #FP15; Replace every 3-6 months 2nd Stage: GAC Filter, #FG15; Replace every 3-6 months 3rd Stage: CTO Carbon Block Filter, #FC15; Replace every 3-6 months 4th Stage: 75GPD RO Membrane, #MC7; Replace every 2-3 years 5th Stage: Inline Post Carbon Filter, #FT15; Replace every year

Material	Polypropylene, Granular Activated Carbon, Carbon Block
Product Dimensions	16"D x 16"W x 12"H
Item Weight	75 Grams
External Testing Certification	ANSI
Product Benefits	Reduces PFAS, chlorine, bad taste, and odor, removes various contaminants for cleaner, safer, better-tasting water.
Brand	iSpring
EU Spare Part Availability Duration	3 Years
Manufacture Year	2017
Set Name	3-Year Replacement Filter Pack
UPC	662425038046 662425058433
Global Trade Identification Number	00662425038046, 00662425058433
Unit Count	1.0 Count
Compatible Water Purifier Models	Aquaphor Crystal, iSpring RCC7
Number of Items	1
Manufacturer	Ispring Water Systems LLC.
Part Number	F22-75
Item Weight	2.65 ounces
Item model number	F22-75
Is Discontinued By Manufacturer	No
Size	22 Piece Set
Color	White
Style	3-Year RO Filter Replacements
Pattern	Cartridge
Item Package Quantity	1
Number Of Pieces	22
Certification	certified frustration-free
Included Components	water filters
Batteries Included?	No
Batteries Required?	No

F22-75

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