Yeh i do apprieciate u dont know wat the 'picture ' is so to speak, well the thing is i have so far found out how to turn the hot and cold water off leading to the kitchen sink, I have since managed to turn off the hot water washing machine pipe, from the boiler system, i have managed to turn everyone off except the thing i really need to turn off, which is the cold water washing machine pipe. Out of curiousity, the reason i want to stop the water supply to the pipe is so i can change the valve on it, that has the little blue lever on it that u turn off and on to stop/start the flow of water. When i turn this on, and attach my washing machine hose to it, there is a leak, can you tell me if actually changing the value is the issue here (ps i totally respect the fact if u cant answer that just incase i havent explained what i mean as acuratly as its needed)