For whole house applications, the Pentek Polypropylene String Wound filters are economically priced general purpose filter designed for sediment reduction including sand, silt, scale and rust particles and ideal for well water applications.
Application:
CW and WP Series cartridges are manufactured from a durable polypropylene cord that is wound around a rigid polypropylene core. They are an economical solution to reduce fine sediment, including sand, silt, rust and scale particles. CW and WP Series cartridges are suitable for a wide variety of sediment filtration applications, including municipal and well water as well as many industrial fluids.
Features:

• Economically priced
• Ideal for well water applications
• Withstands temperatures up to 165F (73.9C)
• String-wound design reduces fine sediment including sand, silt, rust and scale particles from a variety of fluids

The Culligan CW-F, Ametek CW-F, American Plumber W5W are private labels by Pentek and interchangeable as well as the Kleen Plus, Master plumber housing 583328, Plymouth Products, US Filter and Bruner, Parker XTL10T10A

Please note that the Pentek CW-F is a 10 micron filter and the W5W is actually a 5 micron filter, but the two filters are interchangeable.