I would not recommend putting the lines inside a 2" pvc chase. I worked with a guy that had me do that (much to my consternation) on a 4 head system. It doesn't look as neat as you would think and I pray that nothing happens to the lines over the years because they would have to be yanked out completely. They make 'hide-a-line' specifically for those units. Chances are, you may need to have to access those lines at some point. I've put in several more splits on my own and, honestly, if you do a really neat job, the insulated lines (yes, both lines are insulated) don't look all that bad.

Both MS's we have installed are heat pumps . For that reason , both the lines are insulated , as vwhead77 said .

If you are going to pre-run anything , do not forget about electrical .

If you pre-install PVC for the lines , 2" may or may not work . If you do try it , be sure to use long radius electrical PVC conduit 90's . If you use 2" 90's like tou would on plumbing , it is not going to work for the lines .

This ;

https://www.lowes.com/pd/CARLON-2-in...itting/3129167

Not this ;

https://www.lowes.com/pd/LASCO-2-in-...-Elbow/3307898

I am cheap . I used white metal rain gutter downspout & fittings to hide the lines . Plus , it is readily available .

https://www.lowes.com/pd/Amerimax-2-...nspout/1005187

Wyr
God bless