My old washing machine is being collected this morning and a new one delivered. I have tried to disconnedt the water hoses but have found there is nothing - no plastic lever - to enableme to turn the valves to a closed position. There is just an irregular shaped nut with a hole in it. It looks like something should screw into it. I have tried turning the nut with pliers but it isnt turning. Help ! Should I turn all the water off at the mains and leave the pipes with the valves in the on position. There is a hot and a cold pipe. If I do this do I have to drain the hot water tank first ? Why is life so complicated !