7
Pumps as machines or as parts of machines; pumps for heating installation; mechanical pumps; all afore-mentioned goods also as parts for drinking water supply installations, pressure increasing installations, service water heating installations and heating installations
9
Apparatus and instruments for checking and controlling as parts of drinking water supply installations, pressure increasing installations, service water heating installations and heating installations
11
Apparatus and instruments for water softening, in particular as parts of drinking water supply installations, pressure increasing installations, service water heating installations and heating installations; pressure expansion tanks and vessels, in particular membrane pressure expansion tanks and vessels as parts of drinking water supply installations, service water heating installations and heating installations; pressure water tanks
37
Installation, assembling and repair services for warm water supply installations, heating installations, pressure increasing installations and service water heating installations; installation, assembling and repair services for drinking water supply installations