Please help. I recently had a plumber tell me I needed to replace my old Qest pipes and fittings because it had been recalled and would only continue to leak. However, what he replaced it with was new Qest. It’s not even been a week, and already he’s had to come out 3 times to fix leaks in the newly installed fittings. He claims it’s not the materials, that the new Qest is the industry standard but after surfing for information, I’m not so sure. What I am is extremely confused. Is this plumber lying to me or are the new Qest (polybutylene?) pipes and fittings safe to use? Where can I find more information that I can understand?