Watts Premier 531109 Replacement Filter Kit RO PURE PLUS WATER FILTER REPLACEMENT KIT: This 531109 Annual Pack of Filters is designed for use with Watts Premier's RO Pure Plus Reverse Osmosis System. Save money by purchasing all the Filters in one kit together rather than individually. NOTE: This kit will only work with the RO Pure and Pure Plus line of Reverse Osmosis Systems. These filters will NOT fit the Watts 1/4 turn Kwik Change Reverse Osmosis System. RO FILTER KIT CONTENTS: Watts Premier Annual Filter kit contains two - 5 Micron Sediment Filters (105311. Two 5 Micron Carbon Pre-Filters 105351). Made of high quality activated carbon. One 1 Micron VOC (Volatile Organic Compound) Carbon Filter (105381) Made of high quality activated carbon. RO FILTER PERFORMANCE: The Sediment Filter reduces dirt, silt and rust which affect the taste and appearance of your water. The Pre-Carbon Filter reduces chlorine taste and odors, also conditions the water before it is treated by the reverse osmosis membrane. The VOC Carbon Filter reduces VOC chemicals like MTBEs, Atrazine, Benzene, 2,4-D,Lindane and others from your drinking water. EASY FILTER MAINTENANCE: Changing filters is easy with the unique swivel-valve, push-button assembly allowing for one-step filter changes that don't require you to shut off your water source. In order to maintain your system in its top performance it is recommended to change out both the Sediment and Pre-Carbon filters every 6 months, the VOC (Volatile Organic Compound) Carbon Filter every year. This will ensure you have crystal clear, high quality and great tasting water! COMPATIBLE WATER PURIFIER: The 531109 Annual Filter Pack is designed for use with Watts Premier's RO Pure Plus (531417) and Zero Pure Plus (531517) Reverse Osmosis Systems. They are also complatible with Watts Premier's RO Pure (531411) Reverse Osmosis System.