Crystal Quest relies on NSF components and filtration media certifications (standards 42
and 44) to manufacture water filtration systems. Crystal Quest tests system performance through NSF certified water testing laboratories to ensure quality and safety of products (standards 53, 62, 58, 177). Crystal Quest's guaranteed performance*
is aimed to encourage consumers to independently conduct water testing through NSF certified labs to ensure highest quality. No two geographic water source conditions are exactly alike, and relying on certification alone may not necessarily represent a particular water condition. Once a water filtration system is certified, no modifications/adjustments are allowed.