3M itself has no water purification technology. After acquiring two brands, Yalp and Kunnuo, in 2006, it was considered that 3M machines were sold by putting 3M marks on some other machines.

Dalton is a bankrupt brand in Britain, with backward ceramic filter technology, but it was saved by the great China people.

As far as the water purification technology of the two brands is concerned, 3M is better, and the activated carbon rods with discounted membrane and exhausted technology are more advanced than Dalton, but at least they are more qualified.