The ChemixTM gravity block is designed to provide high quality drinking water for pour through and gravity type applications for municipally treated water supplies. This molded block technology is specifically designed to reduce particulate, Volatile Organic Compounds, Lead and Mercury without mains water pressure without priming or pre-wetting procedures. This filter will reduce a wide variety of drinking water contaminants of both aesthetic and health concern. The dense pore structure and vast surface area is ideally suited to improving taste and odor, color, chemicals, lead and mercury. Working pressure .................................................................................NONE- Gravity Feed Maximum working temperature ................................................................................ 100° F Minimum working temperature ................................................................................ 40° F Unrestricted flow .................................... > 1 gallon per hour with 2 inches of head pressure Recommended change frequency ...........................................................every 12 months Performance Data NSF rated to 450 gallons for Lead and Mercury reduction NSF rated to 450 gallons for the reduction of Volatile Organic Compounds *Includes 62 chemical compounds NSF rated to 2500 gallons for Chlorine reduction Sizes 2" x 6" Slimline with supplied wingnut and washer for gravity feed Application AquaCera® Gravity Systems *filters will fit most competitor type gravity feed systems Part Number CMX-6GB Tested to meet NSF Standards 42 & 53 for specified claims reduction Manufactured in the USA