It depends on the quality of initial source of water that is available for for various purposes: Drinking Cooking Bathing Washing clothes etc. If Municipality is the provider with accepted tds value and water contamination is suspected during transit one may choose: Sediment filter 5 micron - sediment filter 1 micron - GAC filter - Carbon activated block filter of 1 micron - copper ion filter - ultrafiltration of 0.1 to 0.001 micron - ultraviolet light. When your first filter is 5 micron which consists outer layer of 10 micron, middle layer of 7 micron and innermost layer of 5 micron it is less likely to be blocked before six months in case of domestic use for one family. After six months one can reuse it after adequate cleaning for the further one year.
It depends on the quality of initial source of water that is available for for various purposes:
Drinking
Cooking
Bathing
Washing clothes etc.
If Municipality is the provider with accepted tds value and water contamination is suspected during transit one may choose:
Sediment filter 5 micron - sediment filter 1 micron - GAC filter - Carbon activated block filter of 1 micron - copper ion filter - ultrafiltration of 0.1 to 0.001 micron - ultraviolet light.
When your first filter is 5 micron which consists outer layer of 10 micron, middle layer of 7 micron and innermost layer of 5 micron it is less likely to be blocked before six months in case of domestic use for one family. After six months one can reuse it after adequate cleaning for the further one year.