20-inch Big Blue 3 Stage Filter Kit with CatCarb/KDF 85, Activated Alumina, and Sediment Filters
- Ships within 1-2 days
The 5 micron sediment filter is a 100% polypropylene filter containing graded density that provides higher dirt holding capacity than standard spun polypropylene and string wound cartridges. The GAC/KDF 85 filter contains 4.0 lbs. of KDF-85 media, along with granular activated carbon (GAC), for whole house removal of chlorine, chloramines, tastes & odors, iron, and hydrogen sulfide. The arsenic filter removes both As +3 AND As +5 without any chemicals. This is a great upgrade to your current big blue system.
The 5 micron sediment filter is a 100% polypropylene filter containing graded density that provides higher dirt holding capacity than standard spun polypropylene and string wound cartridges.
The CatCarb/KDF 85 filter contains 2.0 lbs. of KDF 85 media, along with catalytic carbon, for whole house removal of chlorine, chloramines, tastes & odors, iron, and hydrogen sulfide (rotten egg smell).
The arsenic filter removes arsenic +3 AND+5 equally well with no chemicals
This filter set can be used as an upgrade to your current 20" big blue system.
Fits Big Blue 20" filter housings. The approximate dimensions are 4.5" x 20".
** Note from AFW: The blend of activated alumina we use has now changed and the flow is normal through these filters as you will see with future orders**
These filters do what they claim (at least the sediment and GAC85, I haven't had my water tested for flourine since I installed the system) but they drop the water pressure so much that a flushed toilet or running shower (even with a low flow head) results in little more than a trickle from any other faucet in the house. The issue seems to be mostly caused by the alumina filter which has led me to separate my 3 stage system into a 2+1 arrangement with the alumina filter only feeding my kitchen water supply for drinking water purposes. Since installing my system I have replaced all three filters twice. The initial set worked fine but both replacement sets have had problems with the alumina filter. If you plan on using all three filters, plan on either losing a lot of pressure or reworking your plumbing to separate the alumina filter so it only feeds specific locations rather than the whole house.