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| I have been looking for the last 10 years, I can stop water for the whole building but never found the stop tap. If water was metered it would be easy ! | |
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For every apartment block there is a company or an individual handyman (hauswart) who knows where both hot and cold water may be turned off. Just ask them or him. Most new buildings have them in the main bathroom of each flat and one for the whole house in the cellar area.