This Sub-class includes manufacture, repair and/or maintenance of: •industrial taps and/or valves, including regulating valves and/or intake taps •sanitary taps and/or valves •heating taps and/or valves
•manufacture of valves of unhardened vulcanised rubber, glass or of ceramic materials, see 2219, 23100 or 23939 •manufacture of inlet and exhaust valves of internal combustion engines, see 2811