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iSpring F3 RO Replacement Filter Cartridge Pack Review

The iSpring F3 is a set of three quality reverse osmosis replacement pre-filters designed to remove a wide variety of contaminants from the water and protect the RO membrane to extend its lifespan.

The first filter is a sediment filter which makes up the first stage in the RO filtration process. It consists of food-grade polypropylene micro-fibres that capture all the sediments and contaminants down to 5 microns.

It removes dirt, sand, silt, scales and rust particles in the water hence helping minimize clogs and pressure loss.

The next one is a second stage filter comprising of granular activated carbon that reduces chlorine, chloramines and bad odor and taste in the water. The filter also traps remaining sediments in the water to prevent the 3rd stage filter from getting clogged easily.

The third filter in the set is a CTO carbon block filter that takes the third stage in the RO process. The filter is made of quality activated carbon media that’s wrapped in a polyolefin material with polypropylene outer netting.

This CTO carbon block filter helps to further capture chlorine, chloramines and other chemicals as well as any residual sediments that are bigger than 5 microns. It effectively removes bad taste and odor thereby improving the taste of the RO water.

All three filters come well individually wrapped and have a service life of 6 months before requiring replacement which is pretty the standard lifespan of most RO replacement prefilters.

The filters measure around 10” x 2.5”, so they compatible with almost any residential under sink RO system. If you are looking for some nice and affordable set of replacement filters for your RO system, then this iSpring F3 pack is worth looking at. 

Price & Rating

The iSpring F3 RO Replacement Filter Cartridge Pack Review is rated 4.4* out of 5* and reviewed by 217 verified purchase customers and it is listed at the price of 14.63$.

ProductiSpring F3 RO Replacement Filter Cartridge Pack Review
Rating4.4 out of 5 stars
Recommended price(Check the latest price at Amazon.com)

Product Specification

Dimensions10″ x 2. 5″
Weight:2.2 lbs
Filters1x sediment filters
1x granular activated carbon filters (GAC)
1x carbon block filters (CTO)
Service life 6 months
CompatibleRO systems & Multi-Stage under sink filters


Will these cartridges work on RO systems from the other brands?

If the size of the filter and the end deals are the same then you can use them for other RO systems than the ones from iSpring.

Can this work in an Ecosoft 3 stage water filtration system?

Yes, you can use it for other water filters than iSpring RO systems if they are the same size.

Will the manufacturer recycle or reuse the old filters?

No, there is not any recycling process or reuse the old filters program.

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iSpring F3 RO Replacement Filter Cartridge Pack

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