A plumber left two short "dead legs" when he cut pipes to the tankless coil that was removed when a hot water tank was installed. The attached image is of one. He put a cap on the end of the cut pipes, instead of removing the pipe back to the main pipe. It just seems lazy. I read a lot about NOT allowing dead legs of any length as water stagnates and can grow bacteria. I complained and he now has faucets on the ends so I can drain the pipes, which seems odd. I think he felt it was too complicated to totally remove the pipes. It this an issue? Should I just get another plumber in here to do this differently?