Filter device for surfing bathtub

Surfing bathtub of the utility model on the circulating pipeline arranged two to five levels of filter device, the first, second, fourth and fifth grade, the nano photocatalyst filtering net, the third level for the drinking water standards of activated carbon pellets as of water quality in the middle part of the processing layer; the five level filtering device can also have, according to the specific needs of customers or the environment, in order to meet different needs.