Hi i wanna change the plugs on my valver , just wondering if i can buy the plug socket from halfords? (one that actually reaches the plugs ) and what size is this socket , and any other tips u helpful people wanna give me....before i go attempting this,i know its not a big job but ive never done it on a valver before ! And i wanna buy the right socket so i dont look a fool when i go to halfords..