Custom T-Junction for MrCool MLG450 Line Set Guard

Custom 3D Printed T-Junction for MrCool MLG450 Line Set Guard | Easy DIY HVAC Accessory

This is a custom-designed T-junction made specifically for the MrCool MLG450 line set guard system.
When installing a ductless mini-split, I didn’t want to waste money or space on a bulky two-line cover setup just to create a clean T-connection. So, I designed this 3D printed part to snap right into the MLG450 guard and make the job simple, neat, and professional-looking.

• ✔️ Fits directly with the MrCool MLG450 line set guard
• ✔️ Avoids the need for a second line cover kit
• ✔️ Slim, practical design for a cleaner install
• ✔️ Printable on X and P series

Filament color matching tip: Don’t waste time hunting for the “perfect” filament shade. Just grab the closest neutral color filament you have, then head to Home Depot and get a small spray can of paint matched to your MrCool cover. Works flawlessly and looks factory.

Approx. size: 

• Bottom 190mm x 155mm x 27mm
• Top 190mm x 157mm x 65mm

Print settings used: 0.2mm layer height, infill 50%, support for the top cover

This little part saved me frustration during my own install, and I’m sharing it so other DIYers can skip the hassle and get a clean result.