Hello. My mains stopcock is leaking from the spindle.Stopcock works ok (ish) but is rough.I need good working order due to imminent arrival of new bathroom suite. plastic incoming pipe, copper after.Stopcock is approx. 25 years old. I cannot at the moment isolate supply in street due to debris (awaiting water authority)Is there anyway I can repair leak or will I have to wait for waterboard to make their valve operational?