with packed filtering material

Full Title

Methods or installations for obtaining or collecting drinking water or tap water > from underground > Obtaining and confining water by means of wells > Component parts of wells > Well filters > formed of loose materials, e.g. gravel > with packed filtering material

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

WATER SUPPLY; SEWERAGE

Subclass:

INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER