The RS14-SS OmniFilter Whole House Water Filter Cartridges help improve the taste and quality of your water. They are designed for small and medium filtration systems for a universal fit. Made from PolySpun materials, the water purification cartridges provide maximum performance and are a genuine OE replacement part. They work to reduce sediment, corrosion and rust before these contaminants cause your home quality issues. For best results, they should be replaced every three months. The water filter cartridge replacements come in a two pack. Not only do they provide you with clear, clean drinking water, they can help extend the life of your appliances. Installation is simple so you can start enjoying the benefits right away.