I made a mistake unlike you never ever made a mistake but wouldn't like to be a know it all like you,I'd be bald like you if my head grew as big as yours
could be just one of these you need http://www.amazon.co.uk/Plumb-Pak-Compression-Blanking-Nut-4in/dp/B0039823M8 but when you get a leak always check to see if there's a leak further up that's dripping down, the valve is for the filling loop and the valve has been left open,turn the black...