Thinking about a DIY mini split? These systems come with pre-charged R-454B...

https://aged-wiki.win/index.php/If_I_Over-Torque_a_Fitting,_Is_That_Covered_Under_Warranty%3F

Thinking about a DIY mini split? These systems come with pre-charged R-454B quick-connect linesets, so you skip the vacuum pump and avoid needing an EPA Section 608 license. Plus, 9K and 12K models plug into standard 115V outlets