A/C Flush

Gonna need to flush the A/C system on a 2001 Lumina. Question is one of the hoses has a muffler on it. What is norm on this part. Is it able to be flushed? Or I've heared too that it should be replaced. Opinions please, Thanks.

I have no idea what you're talking about, but I'm wondering if you should even be attempting whatever it is you're doing....

I would replace the orifice tube and put a filter in before the orifice tube....