ISpring WGB21B 2-Stage Whole House Water Filtration System, with 10 x 4.5 S

The WGB21B is a great “point of entry” filtration system and excellent alternative to the larger WGB22B 4. Unlike “point of use” systems the WGB21B will filter water directly from your source. This filter is responsible for removing dirt, rust, and most suspended solids, to protect and extend the life of the CTO carbon block filter.