WATERRO Big Grey 20" Replacement PP Filter Bag – 20 Microns WATERRO Big Grey 20" Replacement PP Filter Bag – 20 Microns is made of high-quality food-grade polypropylene (PP) and is designed to effectively retain sand, rust, sludge, sediment and other mechanical impurities in cold water. The filter bag is designed for WATERRO BIG GREY 20" bag filter housings, providing high water flow, high dirt-holding capacity and easy replacement. Key benefits High-quality food-grade polypropylene 20-micron mechanical filtration Large filtration surface High dirt-holding capacity High water flow with minimal pressure loss Retains sand, rust, sludge and mechanical impurities Quick and easy replacement Compatible with WATERRO BIG GREY 20" filter housings Suitable for domestic and industrial use Long service life Applications Suitable for whole-house water filtration systems, well water, commercial buildings, agriculture, industrial water treatment systems and as a replacement filter bag for WATERRO BIG GREY 20" bag filters. Technical specifications Parameter | Value Product type | Replacement filter bag Filter type | Polypropylene (PP) Filtration rating | 20 microns Size | 20" Material | Food-grade polypropylene Designed for | Cold water Compatibility | WATERRO BIG GREY 20" bag filter housings Package contents 1 × WATERRO Big Grey 20" Replacement PP Filter Bag – 20 Microns Choose WATERRO for effective, high-flow mechanical filtration and reliable protection of your entire water system.