I know what I'd rather do in this situation, but my buddy doesn't have a whole lot of money to repipe his trailer. He is doing remodel work and knicked a water line at a transition. His main water line is polyethylene 1/2. Seriously 1/2 off of the meter. Mind you no shut off valve anywhere. None under the house for the main or at the meter. Are sharkbites fine to go from polyethylene to polybutylene? I told him to rip all the poly b out and go in with pex. Again, can't afford it. Just curious. Only ran into poly b a few times and have ended up repiping everything that was poly b.