i can open the covering plate but i dont have a key to open the valve, also if i do open it it will continue to flood, i need to get the gym to get a plumber to find their internal stopcock so the mains can be left on for me to get water while they sort out whatever is causing the problem, as well as my suspicions about the drain blcokage i have been todl in the past that a previous owner of the gym discovered a leak and instead of getting it fixed merely rerouted the leak into the waste pipe. not being a plumber i have no idea whether this is possible or likely but i cant get anyone to investigate it, ive tried the local council,the mp the msp etcetc and no one is interested.