... Service life : ≥3 year7. Joint dimension : 1/2” Advantage of Wellblue water filter1. Catridge material is ultrafilteration membrane, which filteration precision ... ,sand, rust, colloid, bacteria, virus and so on.2. Keep mineral substance and microelement which is benefical to human ... heavy metal and chlorine from the water.8. It can be installed in the cabinet ,save the room. Household UF water filter