PEX line size needed.

[Rgerhardt61]

Hello,
I currently have a 1” stub out in the garage for my water softener I installed. I want to install a filter and was wondering if it all needs to be 1” pex or can I go to a 3/4” line.
Thank you

 

[Geofd]

Leave it 1" and reduce on the outlet side of the filter, put a bypass on the filter so you can bypass the filter if you had to,that way you wouldn't be without water