After the plumber had repaired our leaking toilet cistern on Thursday (he replaced the ball valve), it started overflowing. I had to twist it to stop it flushing. Then it wouldn't re-fill, unless I twisted it again. He's coming back but not till Tuesday. Mrs. Clarion says it's my fault for messing with it! I can't just turn the stop valve off, can I! We'd have no water at all. It's a faulty replacement. Simples. But no. It's my fault! :o(