Self-cleaning pre-filter to remove oversize materials and contamination from liquid passing your filtration system. More than 200,000 times waterproof hammer test and 60KGS explosion-proof test Equivalant to standard of NFS certificate Features: 1. Flow rate: 4T/H 2. Material: copper, food-grade ABS 3. Removes sediment, debris, rust, dirt, sand, floating matters etc.