Description
Gravity Feed Filter Comparison
Which Gravity Feed Filter Is Right for You?
Greenfield gravity feed filters are designed to fit many leading gravity systems and support different water quality needs. The best choice depends on your water source, desired flow rate, contaminant concerns, and maintenance preferences.
| NanoMetix™ | CeraMetix™ | Aquametix® | NanoFiber™ | |
|---|---|---|---|---|
| Best For | Customers wanting advanced broad-spectrum filtration for well or city water | Customers needing strong sediment, microbial, and broad-spectrum contaminant reduction support | City water users wanting strong broad-spectrum contaminant reduction with a faster drip rate | City water users wanting fast flow, low maintenance, and strong everyday filtration support |
| Recommended Water Source | City or well water; untreated surface water may require additional disinfection depending on source conditions | City, well, or untreated surface water; additional disinfection may be needed for untreated surface water depending on source conditions | Best suited for city water | Best suited for city water; not recommended for untreated well or surface water with sediment or iron concerns |
| Filtration Approach | Dual-layer design using an electrokinetic outer layer with an internal carbon block core | Ceramic outer shell with internal broad-spectrum contaminant reduction media | Carbon-based broad-spectrum gravity filtration with faster flow than ceramic-style filters | Electro-positive nanofiber media designed for fast flow and sub-micron particle capture |
| Contaminant Focus | Designed to address particulates, chlorine/chloramine, VOCs, PFAS, fluoride, heavy metals, pesticides, herbicides, pharmaceuticals, and more | Designed to address sediment, bacteria, cysts, chlorine, VOCs, fluoride, heavy metals, pesticides, herbicides, pharmaceuticals, and more | Designed to address chlorine/chloramine, VOCs, fluoride, heavy metals, nitrates/nitrites, pesticides, herbicides, pharmaceuticals, and more | Designed for city water concerns including particulates, taste, odor, and broad everyday contaminant reduction support |
| Microbial / Particulate Support | Strong fine particulate support; surface or wild water may still require disinfection depending on source conditions | Strongest choice here for sediment-heavy or biologically variable water sources; ceramic shell can be cleaned as needed | Not the first choice for untreated or sediment-heavy water | Strong sub-micron particle capture, but not recommended for untreated well or wild water due to clogging concerns |
| Flow Profile | Designed for high-performance gravity filtration with minimal flow restriction | Typically slower than non-ceramic options, especially as sediment accumulates | Faster drip rate than ceramic-style filters | Fastest-flow option in this comparison |
| Maintenance | Handle gently; rinse/flush according to instructions and avoid damaging the pleated outer layer | Washable ceramic shell can be gently cleaned to restore flow | Flush before use; replace when flow, taste, or performance changes | Outer wrap may be gently rinsed to restore flow; do not scrub like ceramic |
| System Compatibility | Fits Berkey and many leading gravity systems; available in standard and imperial sizing | Fits Berkey and many leading gravity systems; imperial size not for Sertodo systems | Fits Berkey and many leading gravity systems; imperial size not for Sertodo or Terra2 systems | Fits Berkey and many leading gravity systems |
| Included Filters | One filter for the top reservoir | Two filters for the top reservoir | Two filters for the top reservoir | One filter for the top reservoir |
| Mineral Bag | Optional mineral bag available | Optional mineral bag available | Optional mineral bag available | Optional mineral bag available |
| Important Notes | Do not mix filter types. Not compatible with red dye tests. For untreated surface water, consider additional disinfection depending on source conditions. | Do not mix filter types. Ceramic shells are breakable and should be handled gently. Not compatible with red dye tests. | Do not mix filter types. Not compatible with red dye tests. Best for city water use. | Do not mix filter types. Not compatible with red dye tests. Best for city water; sediment and iron can shorten lifespan or cause clogging. |
Quick Guidance
Choose NanoMetix™ if...
- You want our advanced broad-spectrum gravity feed option
- You are filtering well or city water
- You want strong contaminant reduction support without a ceramic shell
ChooseCeraMetix™ if...
- You have well, wild, or sediment-prone water
- You want a washable ceramic shell
- You want strong support for microbial and fine sediment concerns
Choose Aquametix® if...
- You primarily use city water
- You want broad-spectrum chemical contaminant reduction support
- You want a faster drip rate than ceramic-style filters
ChooseNanoFiber™ if...
- You use city water and want the fastest-flow option
- You want a simple, low-maintenance filter
- Your water is not sediment-heavy or iron-heavy
Still not sure which gravity filter is right for your water?
We’re happy to help you choose based on your water source, gravity system, contaminant concerns, and preferred flow rate.
Contact Us for Help Choosing
Stephanie H. (verified owner) –
Best filters ever! I will be purchasing more soon!
John S. (verified owner) –
Never had better tasting water after installing these in my Berkey . Knowing these filters can filter out so many contaminants gives me such peace of mind. Thanks so much!
Suzanne Horowski (verified owner) –
I have not put in the new filter just yet, but I am happy with the system so far.
Katie (verified owner) –
Love what the filter does and great customer service!
Jordan M. (verified owner) –
I always appreciate ordering from Greenfield. Their filters work great but more importantly they were open about when more would come in so I could make an informed order and they got them shipped quickly.
Anonymous (verified owner) –
This is my second set of Greenfield ceramic filters. I cold taste a difference the first time I drank a glass of of water from these filters, great taste! I also like the mineral bag, much needed.
Trudy T. (verified owner) –
Katelyn (verified owner) –
Great products, through and through💕 quality and money well spent.
Raed A. (verified owner) –
the best filters for counter top. the newer ones were slow and had a weird taste