TST Water inline filters are constructed from the highest quality carbons, specially selected plastics and proprietary media for POU and RO applications. The high capacity/ low-pressure drop filters are 100 percent factory leak tested and NSF Standard 42-listed water washed coconut shell GAC. All materials are NSF approved or FDA compliant; specific models are NSF certified. Options include private labeling, multi-media and custom media fills and custom packaging. John Guest openings also available.www.tstwater.cominfo@tstwater.com