Quality Filtration: wound water filter have a deep bed filtration function,which It presents honeycomb structure of being dense inside and sparse outside. Wound sediment filter can reduce 99.99% sand, scale, rust, sediment, particles. High Capacity: The filter can filter 20000 - 30000 gallons depending on water quality. Suggest to replace it every 3- 6 months for the average household for optimal performance depending on the use. Multiple Advantages:It has the advantages of high filtration accuracy, large flow rate, small pressure difference, high compressive strength, large pollution tolerance, non-toxic and tasteless, and no secondary pollution. Maximum Operating Temperature(Celsius): 80 Celsius Applicable pH value: 1-13 Maximum Operating Differential Pressure(Bar): 4.2Bar Recommended Changed-out Differential Pressure(Bar): 2.4Bar Pure Polypropylene Microfibers String wound filter is a kind of water filter.The textile fiber line which made from specific technology of precision,