Pentek - 155583-43 EP-20BB Carbon Block Filter Cartridge, 20" x 4-5/8", 5 Microns

This is a good quality 5 micron carbon block filter that I've used many times before with good results putting it after a 5 micron pleated pre-filter. Note that it's listed as 4-5/8" diameter, which in the past has been a problem in some 4-1/2" housings, but it's now been slightly redesigned with thinner end cap plastic material and now comes in at 4-9/16" exactly so fits mine properly. Unfortunately the one I received was very poory packed in an oversized carton and arrived with a broken end cap, but should still be useable, so not worth the hassle to return for a refund -still disappointing

This is a great filter for the price. I have bought cheaper filters in the past and they do not get the chlorine taste out of the water. Always end up buying the more expensive filters to get the results I want. Well this one works great. Zero chlorine

You get what you pay for - this thing filters well and keeps water tasting good. I just wish these were not so pricey.

I get municipal drinking water with 1-2ppm of of chlorine (as much as a public pool) and 22 grains of hardness (more than 2x what's considered "extremely hard"). When I had a water softener installed in my house, I also had a  Pentek 20" Big Blue Housing  installed before softener. I wanted the carbon filter for a few reasons: 1) Keep chlorine out of the shower and bath, out of my family's lungs and off of our skin 2) Keep chlorine out of the washing machine where it bleaches our clothing 3) Protect the resin in the water softener, which should double it's life 4) Protect the plumbing (PEX pipes, rubber in fixtures, etc...) from chlorine 5) Remove the small amount of sediment that is in the city water which collects in valves and fixturesI previously used the  Pentek RFC20-BB Radial-Flow Granular Activated Carbon Cartridge . In comparison, this filter is less expensive, has a finer sediment filter (5 micron vs. 25 micron) and it's rated for up to 180F. Also, carbon block filters don't have the same channeling issues as GAC filters, which become less effective at higher flow rates.However, compared to the RFC20-BB this filter can't handle as much water (only 40,000 Gal. vs. 70,000 Gal.) and has a bigger pressure drop (5.5 psi @ 5 gpm vs. 0.9 psi @ 4 gpm). Neither of those were a big concern for me. We use less than 1,000 gal/week so the capacity easily exceeds the 6 month replacement cycle. As for water pressure, I get a solid 60+ psi coming into my house and even a 10 psi drop is not noticeable. If you already have pressure issues, get RFC20 instead. Pentek 20" Big Blue HousingPentek RFC20-BB Radial-Flow Granular Activated Carbon Cartridge

Easy to use