NSF/ANSI 50

• Vitroclean® recycled glass is a direct replacement for silica sand. Using our proprietary milling technology, we remove contaminates to produce a clean, high quality filter media Vitroclean® offers you the safest, most reliable and cost effective way to upgrade your sand filter system Vitroclean® lasts 50% longer than typical silica sand Doesn't clump or channel like silica sand - 100% of the filter bed fluidizes for the life of the media Does not require a special 'recharging' regime, like zeolite products Vitroclean® installs in any standard sand media filter No sharp edges or hazardous crystalline silica dust We recommend the use of Vitroclean® Pebble in the bottom of the filter to cover the laterals This is critical, especially on larger filters to insure proper diffusion and flow Pool owners quickly see the difference in water clarity Vitroclean® filters substantially better than sand or zeolite DE quality down to 5 um without the hassle of DE

Vitroclean® is made from 100% recycled glass. It is crushed, dried at 500 deg F and screened into various sized fractions to achieve optimal filtration properties. As the grains are nearly all angular in shape and have a fairly high degree of sphericity, the filter bed tends to have more open packing resulting in better permeability than a filter of spherical silica grains. Because glass is amorphous and has no internal crystal structure, the particles are homogenous and have no grain boundaries. This gives glass more resistance to breakdown through filtration/back washing cycles. Furthermore the lack of grain boundaries minimizes cracks where bacteria can lodge and resist flushing in back washing. Glass particles have a slight negative charge on their surface, which tend to hold onto fine particles during the filtration cycle. Upon back washing, this weak charge apparently releases these fi ne particles to the effluent thereby contributing to better filtration action. Theoretically, at least one should see less use of back flushing water owing to the better permeability of a glass filter. As crushed glass is lighter than silica sand, between 15 and 20% less glass is needed to fill a filtration unit. With the better filtration characteristics and lower density glass is a superior filtration media for many filtration applications. It can be used in swimming pool and spa filters as well. Glass filter media is now used in storm water runoff filtration systems as a replacement for silica sand. Using glass not only results in good performance, but in real cost benefits over the life of a filter bed.