Suitable for most standard 4 stage Reverse Osmosis Water Filters including the Watts 4 stage Reverse Osmosis Water Filter system. These systems have 4 different types of filters. For the first two pre-filters which come in this set, it is advised to change these approximately every 6-12 months but it really depends on your water quality and TDS reading. This 6-12 Monthly 4 Stage Reverse Osmosis Replacement Filters Pack contains the with sediment and carbon block filters.
The second set of post-filters should be changed every 2-3 years on average and is available as a separate set here.
Buy Top Quality Internationally Certified Systems
||6 Monthly 4 Stage Reverse Osmosis Replacement Filters Pack
||Pre-filtration replacements for most standard 4 stage reverse osmosis systems:
1 x Sediment Filter - NSF Standard 42 Certified
1 x Carbon Block - NSF Standard 42 Certified