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I’m planning on removing a cast iron radiator in my hallway. This is for three purposes: 1. To have the radiator sand-blasted, 2. to address the wall behind the radiator and 3. to tile the floor beneath the radiator.

I was wondering if turning off the local radiator valve is sufficient to remove the radiator or whether I somehow need to close off the entire water supply. It’s a hot water (not steam) radiator.