INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER (drilling wells, obtaining fluids in general from wells
E 21 B; pipe-line systems in general F 17 D)
1
/
00
Methods or layout of installations for water supply (E 03 B 3/00, E 03 B 9/00 take precedence) [4]
1
/
02
•
for public or like main supply
1
/
04
•
for domestic or like local supply
3
/
00
Methods or installations for obtaining or collecting drinking water or tap water (treatment of water C 02 F) [4]
3
/
02
•
from rain-water
3
/
03
•
•
Special vessels for collecting or storing rain-water for use in the household, e.g. water-butts
3
/
04
•
from surface water
3
/
06
•
from underground
3
/
08
•
•
Obtaining and confining water by means of wells (applicable to a combination of water and other liquids or to other liquids only E 21 B 43/00)
3
/
10
•
•
•
by means of pit wells
3
/
11
•
•
•
•
in combination with tubes, e.g. perforated, extending horizontally, or upwardly inclined, exterior to the pits
3
/
12
•
•
•
by means of vertical pipe wells
3
/
14
•
•
•
by means of horizontal or oblique wells
3
/
15
•
•
•
Keeping wells in good condition, e.g. by cleaning, repairing, regenerating; Maintaining or enlarging the capacity of wells or water-bearing layers (with artificial enrichment E 03 B 3/32)
