normally i can never turn of my water. if im fitting a dishwasher.washing machine i let the water piss everywhere and put the hose on as fast as i can. this time i managed to turn the water of. so i fitted new dishwasher without water all over the place... turned the water back on, i have cold water in my kitchen tap. but there is no water running in my cold tap in the bathroom and its also effecting my washing machine. if i try and turn the stop valve. it just pisses out with water. there are electric plugs under my sink. and it shits me up a bit. but also i cant afford to call someone out. all i did was turn the stop valve. i have tried to show a pic.
look for a stop cock like this in one of the places I mentioned. If you have a water meter there may be a plastic T handle that can be screwed down to turn off the water. Stopcocks always have a T handle. If underground they usually have a small iron lid you can lift up.
There is a chance you have a service valve like this but it will not be underground, it will be a recent addition.
From looking at the picture I would say your ex has removed the stopcock and fitted that tee in its place to avoid making a separate junction to serve your appliances. In a word it looks like a amateur setup. That looks like an isolator the dishwasher is connected to, and some only let water pass one way usually. If you look closely there will be an arrow stamped on the body of it indicating flow direction.
thanks he defo did not remove anything he only added the white plastic tubing bits... yes he had managed to turn the water of. but when i contacted him to ask how. he cant remember. so when i had fitted new things i just let the water flood the kitchen whilst i connected the hose to the machine. as i said i found i could stop the water by turning the small nut bit in between the yellow looking bit and the white plastic. i used pliers to do it and i think i have messed it up. i have had to leave it in the blocked position if i dont water gos everywhere. its now looks like i have damaged the valve as its sort of squirting out as if it has a pin hole. anyway somone is coming to look tomorrow. fingers crossed it can be sorted.... thanks though