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 4 times the capacity of standard 10 in filters. Use with Nos.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.