... : ≥3 year7. Joint dimension : 1/2” Advantage of Wellblue water filter1. Catridge material is ultrafilteration membrane, which filteration precision is ... .01 micron. It can remove the harmful substance from the water , such as mud,sand, rust, colloid, bacteria, virus and ... energy, not need to add pressure and electricity, and no waste water appearing.6. Pure physical filteration principle, not add any ...