Easily installs on cold water line, reduces dirt, sand, silt, rust and scale particles to protect fixtures and appliances such as water heaters. For high-flow/heavy-sediment applications including private wells, large homes, farms, restaurants, swimming pools, spas or trickle irrigation. Durable polypropylene construction. Provides 4X the capacity of standard 10 in filters. Use with no R50-BBS, CP5-BBS or RFC-BBS filter cartridges, no OR-100 replacement O-ring, and/or no WBA mounting bracket. NSF International tested and certified.