What is included in the Vertex FK-100 + MA-4202 bundle?
The bundle includes one FK-100 Standard GAC filter kit with three replacement filters, a filter wrench, two O-rings, and instructions. It also includes one MA-4202 36 GPD reverse osmosis membrane.
Which Vertex RO systems are compatible with this bundle?
Both included components are listed for the Vertex PT-4.0 four-stage reverse osmosis system. The FK-100 also supports the PT-504, but compatibility of the complete bundle with that model needs verification.
How often should the FK-100 filters be replaced?
The FK-100 sediment, carbon block, and GAC post-filters should typically be replaced annually. Replacement frequency may vary based on water conditions and usage.
How often should the MA-4202 membrane be replaced?
The MA-4202 RO membrane is typically replaced every 2–3 years, depending on water quality, usage, and filter maintenance.
What does the MA-4202 36 GPD membrane do?
The membrane uses reverse osmosis technology to reduce dissolved solids and other impurities in water. Vertex describes average dissolved solids reduction of approximately 95%, with actual performance dependent on operating conditions.
How does the FK-100 filter kit protect the RO membrane?
The sediment filter captures suspended particles, while the carbon block filter reduces chlorine exposure. These filtration stages help protect the membrane and support longer service life.
Does this bundle improve water taste and odor?
Yes. The activated carbon block and GAC post-filter help reduce unwanted tastes and odors. The RO membrane also helps reduce dissolved solids.
Is the RO membrane included in this bundle?
Yes. Unlike the FK-100 annual filter kit sold separately, this bundle includes the MA-4202 36 GPD membrane.
Can I install the bundle myself?
Installation may be suitable for users familiar with their Vertex RO system. Follow the manufacturer instructions for filter replacement, membrane installation, flushing, and leak checks.
Is the MA-4202 membrane WQA certified?
No. The MA-4202 36 GPD membrane is no longer WQA certified, according to the Pure n Natural Systems product listing.
Is this bundle compatible with five-stage Vertex RO systems?
The MA-4202 membrane is listed for the PT-4.0/5 five-stage system, but the FK-100 is a four-stage filter kit. Five-stage systems generally require the FK-101 filter kit instead.
Why replace the filters and membrane together?
Replacing both when due helps restore filtration performance, maintain drinking water taste, and reduce repeat maintenance visits.
