http://www.waterfilters.net/Pentek-WP30-Sediment-Filters.html
The Pentek WP30 Polypropylene Wound Water Filter Cartridge features a string-wound design to reduce fine sediment from a variety of fluids. It withstands temperatures up to 165° F. The WP-30 sediment filter 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. They are wound in a precise pattern around the core providing greater surface area. The result is higher dirt-loading capacity and greater efficiency than standard wound cartridges like the CW Series. These water filter cartridges are suitable for a wide variety of sediment filtration applications, including municipal and well water as well as many industrial fluids. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.
