The right line set is the whole install.
Pre-charged Quick Connect® line sets and the couplers, fittings and accessories that make a MRCOOL® DIY install leak-free — matched to your head's BTU and the run you actually need.
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The offer
Line sets & install parts.
Pre-charged Quick Connect® line sets and the accessories that finish a clean DIY install.
Unsure which line set fits your head? The System Builder pairs the right length and class automatically.
1/4" + 1/2" pre-charged Quick Connect® line set
1/4" + 1/2" pre-charged Quick Connect® line set
1/4" + 1/2" pre-charged Quick Connect® line set
1/4" + 1/2" pre-charged Quick Connect® line set
1/4" + 1/2" pre-charged Quick Connect® line set
1/4" + 1/2" pre-charged Quick Connect® line set
How it works
Pre-charged, correctly-sized, hand-tighten line sets.
Every MRCOOL® Quick Connect® line set ships pre-charged and leak-free — no flaring, no vacuum, no gauges. Match the diameter class to your head's BTU and the length to your run, and it hand-tightens into place.
Match the class
1/4"+1/2" for smaller heads, 3/8"+5/8" for 24K+.
Match the length
Measure condenser-to-head and pick the run that reaches.
Hand-tighten
Quick Connect® fittings seal leak-free — no flaring.
Add the extras
Couplers, brackets and pads to finish the install clean.
Why bother
The wrong line set turns a weekend job into a return.
Too short and you can't reach the condenser. Wrong diameter for the BTU and the system underperforms. Guess on gauge or flare hardware and you risk a leak you can't legally recharge yourself.
Why not call a contractor
A mismatched line set is the most common DIY mistake.
Freight-returning a too-short line set is a headache, and an undersized line on a big head chokes capacity. The line set is small next to the system — but it's the part that decides whether the install succeeds.
The payoff
A clean, leak-free, code-friendly install — first try.
Get the line set that fits.
Add the right line set and parts below, or let the System Builder pair them to your head automatically.