[TRIPLE SYSTEM] There are three stages in our carbon sediment filter 20″ system, however you will find only two different cartridge styles. While eliminating the same contaminant 2 of whole house sediment filters (4 – 6 months) guarantee the absence of rust, clay particles, small pieces of organic matter, sand grains, etc. Meanwhile, they open the door for the work of the next activated carbon cartridge, which in its turn adsorb volatile organic chemicals, pesticides, herbicides, halogens. [COCONUT SHELL] While featuring a solid filter bed the carbon block cartridge 5 micron (6 – 12 months) has a porous structure which allows fluid to flow through it. There are a lot of preparatory phases before the very production: coconuts are harvested, transformed, their fibrous envelopes are cut and compacted. Large quantities of this raw material are available as it is a natural resource that makes the 20 x 4.5 inch carbon filter by Aquaboon be the most ecological system. [SPECIFICATIONS] Universal sized 3 of 20″ whole house housings have the capacity up to 40 000 Gallons and come with 1” connections. They are made of FDA grade polypropylene. Carbon block whole house replacement filter can withstand temperatures from 39°F to a maximum of 125°F, its max. operating pressure is 90 PSI. The product has 20,000 Gal capacity and 6 GPM flow rate. Bracket and screws are included in package. [COMPATIBLE SYSTEMS] APEC Water Systems FH-3-20, Geekpure -20B, -20T, Max Water 105857×3, 105853×3, 105171×3, Pentek150233, 150467, FS-222, HFPP_PR20_6_PACK, 160168, Premier Water Systems 3BIGBLUE20, Ronaqua RA-3-124-20 [COMPATIBLE CARTRIDGES] iSpring F4WGB22B, Geekpure PP2CB4-20, PP2CB2-20B, PP2CTO4-20, 3M Aqua-Pure AP810-2, CFS COMPLETE FILTRATION SERVICES EST.2006 cfs-10, Geekpure CB-20B, PP20-5, iSpring FP25B, LiquatecSDF-45-2005, Neo-Pure MBGC-45200-05, Oceanic Water Systems SFM, PentekDGD-5005-20, EP-20, CWD-PENTEK-DGD-5005-20, Premier Water Systems WFCB45, Tier1 P5-20, EP5_20, Viqua CMB-520-HF, C2-02, WattsFPMB5-20, WCBCFF20, Aquasure AF-CB5-4520, IPW Industries Inc. PP-10-20-5. OPTIONAL PRE-FILTER. The spin-down reusable pre-filter is the first line of defense in your filtration system. It will extend the life of your standard filters by removing dirt, sand, and rust particles. NOT included in the set.