The Watts Premier 531160 RO Pure Plus VOC 4 Pack Filter Kit is a 4 Pack of filters that are designed to be used with the Watts Premier's RO Pure Plus and Zero Pure Plus Reserve Osmosis System. This kit is also compatible with that Watts Premier's RO Prue Reserve Osmosis System. 

Filter Descriptions: 

• 5 Micron Sediment Filter (105311): Reduces the amount of sediment from rust, dirt and silt that would affect the appearance and taste of the water. 
• 5 Micron Carbon Pre-Filter (105351): Reduces the amount of chlorine taste and odors and conditions the water before it is treated by the reserve osmosis membrane. Made with high quality activated carbon.
• 1 Micron VOC (Volatile Organic Compound) Carbon Filter (105381): Reduces VOC's including Pesticides, Herbicides, TTHM, DPB, etc. Made with premium high capacity carbon block.
• 50 GDP Membrane (105331): Reduces a wide range of contaminants such as Arsenic, Copper, Nitrates, Perchlorate, Chromium, Lead, Dissolved Solids, as well as Cysts including Giardia and Cryptosporidium. Made as a semi-permeable membrane.  

Certifications:

• Certified to NSF/ANSI 372 Lead Free
• Certified to NSF/ANSI 58 Certified Reverse Osmosis Units
• Certified by WQA