Big Blue CTO Carbon Block & Sediment Water Filters 4.5" x 20" Cartridges Set Cartridge Type_Pleated Sediment Recommended filter change (Model No

Recommended filter change (Model No

20 Inch Big Blue Housing

Especially great for R/O units pre-stage filtration

The NT-1 accepts all standard 10-inch replacement filter elements (To achieve the best water quality use only Ronaqua cartridges)

the black cap is made of high-flow polypropylene for toughness

Big Blue CTO Carbon Block & Sediment Water Filters 4.5" x 20" Cartridges Set Cartridge Type_Pleated Sediment Recommended filter change (Model NoBig Blue CTO Carbon Block Water Filters 4. 5" x 20" Whole House Cartridges 20" Big Blue Block Activated Carbon filters are similar in their performance to that of GAC filters, being made of fine coconut shell carbon they also do remove odors and tastes of many organic compounds, chlorine especially. Though, because this filters are made of a packed carbon (forming a cylinder block), they offer a much finer filtration of suspended particles and dirt.