BI-ANNUAL RV FILTER REPLACEMENT KIT: Say goodbye to unpleasant tastes and odors with the Watts Premier Bi-Annual 2-Pack RV Filter Kit, which is compatible with the four stage RO-TFM-4SV (09129993) and ZeroWaste (0950045) Reverse Osmosis Systems. The included 2 filter types are tailored for specific filtration purposes, collectively ensuring crystal clear, great-tasting drinking water every time. HIGHLY EFFECTIVE FILTRATION: This 2-pack kit includes one 5-Micron Sediment Filter (WP104017) for reducing dirt, silt, and rust that affect the taste and appearance of your water; one 5-Micron Activated Carbon Pre-Filter (WP101009) for conditioning the water and reducing chlorine taste and odors. VARIABLE APPLICATION: These NSF-certified filters are an excellent choice for a wide variety of settings, including residential applications, food service, and commercial drinking water applications. QUALITY CONSTRUCTION: These durable filters are crafted from high-quality materials for maximum filtration. Filter life may vary based upon local water conditions or use patterns, but we recommend replacing sediment and carbon pre-filters every 6 months or 3,000 gallons. THE PREMIER DIFFERENCE: Since our founding in 1989, Premier has been dedicated to the design, development, and marketing of high-quality water filtration systems that exceed industry standards. Following our Watts Water Technologies in 2001, our audience and influence have only expanded, solidifying Watts Premier as a trusted leader in the industry.