A plumber came earlier today to install a new bath tap shower unit. As the bathroom cold water is served from a cold storage tank in the roof of of flats there is a separate stopcock but he couldn't turn it so abandoned it for the day. Problem is none of the hot taps are now working! Does anyone know what I'm supposed to do to turn it back on. The stopcocks in this picture would feed the tank at the base but I can't see anything in the pipe which comes out the top?
Any help appreciated
Any help appreciated
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