Shurflo by Pentair Quad-Stage Bacteriostatic KDF/Carbon In-Line City Water Entry Filter w/Garden Hose Ends [RV-210GH-KDF-A]Quad Stage Bacteriostatic KDF Carbon In Line City Water Entry Filter with Garden Hose Ends All filtration systems are not created equal. With so many choices in water filtration, how do users know which filter is best for them? Do users know the quality of the filtration media that hides behind the walls of a filter? When looking for a reliable filter, Pentair has the solution. Pentair uses only the highest quality filtration media in its Waterguard