In this video
- How to gently straighten a sharply angled line set so it lies flat against the wall
- Why the condensate line must stay below the refrigerant lines and slope to a low point
- Why the indoor coil produces condensation and how that water needs to drain outside
- Using a line set cover to hide and protect the copper lines once they're shaped
- Using one-hole clamps to route the condensate drain to a safe, predictable spot
Questions this video answers
Why do I need to straighten the line set before installing my mini-split?
The line set often comes with a sloping bend from packaging, and you need a section of straight line (about four feet) to run cleanly against the wall. Gently massaging it straight makes the whole run look neat and keeps the tubing from being stressed at odd angles.
Why is water dripping from my mini-split line set?
That's normal condensation, not a leak. The indoor coil sweats the same way a cold drink sweats on a humid day, and that water has to travel down the condensate line and drain to the outside of your house.
Does the condensate drain line need to slope downward?
Yes. The condensate line should stay below the refrigerant lines and be kept at a low point along the whole run. If it isn't sloped properly, the water won't flow out of the unit and can back up instead of draining outside.
Can I bend the copper line set myself without special tools?
Yes, for gentle shaping you can massage the copper by hand — cup it near the wall and curve it gradually rather than forcing sharp bends, since copper doesn't like being bent into hard angles and will kink if you're too aggressive.
What is a line set cover and do I need one?
A line set cover is a channel that snaps over the exposed copper lines to hide them and give the installation a clean, finished look. It's optional for function, but it's the easiest way to dress up a line set run that looks a little rough once it's bent into place.
What are one-hole clamps used for in a mini-split installation?
One-hole clamps secure the condensate drain tubing so it holds its position and directs water to a predictable place, like a drain or the outside of the house, instead of dripping onto something it could damage.
Is it a problem if the line set has a curve or loop in it?
No, a couple of gentle curves in the line set are fine. The compressor acts as a pump that moves refrigerant through the lines regardless of a few bends, so you don't need to worry about that part.
Transcript
Read the full transcript
Next step: we're going to get this line set against the wall, and you'll see it's about a 90, a sloping 90-degree angle. So we need about four feet here of straight line set. We're going to straighten this out ever so gently — again, straighten this out — so this part is going to go against the wall, and now we have to bend this down.
Remember this condensate line here: you don't want it twisted, and you want it to be below your refrigerant lines, below the line set. So do that, and that way you want to make sure there's not a lot of weight on there too, but you want to make sure that it's at a low point. Because if it's not, the water won't flow out of your unit.
Condensation happens as part of the refrigeration process — the same way when you have an icy cold drink on a humid day, it sweats on the outside. The same thing happens with the coil on the inside of your indoor unit, so that means we drain it to the outside of your house.
Okay, so put your hand near the wall ever so gingerly and massage the line set. Yeah, this is ugly right now, but you'll put a line set cover on — this line set cover should come out to this point — and you can massage this any way you need to. It's fine if it has a couple of circles in it.
The pump that's in the compressor — the compressor acts as a pump that will move the refrigerant through there — you don't need to worry about that. But you probably want to get some one-hole clamps to clamp this, such that the condensate flows to a predictable place and not into something where it's going to be causing harm. This water will be coming out of this tube, but you can dress this up however you want. This step is done.
