Copper is tough stuff, but it’s not indestructible — and a lineset that’s been kinked, crushed, or left sitting with open ends is a problem before it’s even installed. How you handle and store linesets on the job site directly affects the quality of the install.
Uncoil it — don’t fight it
The number one way linesets get damaged on site is kinking during uncoiling. A pre-insulated twin coil has memory: it wants to stay coiled. If you fight that memory, the copper folds instead of bending, and you’ve got a kink.
The right way: set the coil on the ground with the loose end facing the direction of the run, and unroll it — don’t pull it straight off the coil like a rope. Walk the coil out and let it unroll naturally. If you’re working alone, anchor the starting end so the coil doesn’t roll away from you. A kink in the suction line is a restriction you can’t undo. Once copper kinks, that section is compromised — there’s no straightening it back to reliable.
Respect the bend radius
Every copper tube has a minimum bend radius, and the larger the tube, the more generous you need to be. Don’t bend tighter than about five times the tube diameter — and check the manufacturer’s guidance if you’re unsure. Use a proper tube bender or bending spring for tight turns, especially on the larger suction line. Hand-bending a big tube around a sharp corner is how kinks happen.
This matters even more in cold weather. Copper work-hardens faster when it’s cold, so a bend that would be fine in July can crack or kink in January. If the coil has been sitting in a cold truck, give it time to warm up before you start bending. (More on cold-weather work in our Calgary cold-climate tips.)
Keep the ends capped
Keep the ends of the lineset capped or taped shut until you’re ready to connect. An open copper tube on a job site is a magnet for dust, drywall debris, insects, and moisture. All of that ends up inside the sealed refrigerant circuit if you’re not careful.
When you cut to length, cap or tape the cut ends immediately — don’t leave them open. Purging with nitrogen before brazing is good practice, but it’s no substitute for keeping contaminants out in the first place.
Protect the insulation jacket
The jacket on a pre-insulated lineset is tough, but it’s not armour. Dragging a coil across concrete, pulling it through a rough stud penetration without a sleeve, or letting it rub against a sharp metal edge can tear it. A torn jacket exposes the insulation underneath, which can absorb moisture or get damaged — and then you’ve got a cold spot.
When routing through penetrations, use a sleeve or at minimum smooth the rough edges. When pulling through tight spaces, have someone feed while someone else pulls — don’t just yank it through from one end. If the jacket gets nicked, seal it with appropriate tape. Small damage is fixable; ignored damage becomes a callback.
Storing coils on site
If linesets are going to sit on the job site for days or weeks before the install, store them like you mean it:
- Keep them off the ground. On a pallet, a rack, or at minimum on blocking — not directly on dirt or concrete where moisture wicks up.
- Keep them dry. Under a tarp or inside if you can. The copper won’t rust, but the jacket and any exposed cut ends don’t want to sit in standing water.
- Don’t stack heavy material on them. A coil with a compressor or a bundle of strut sitting on it will deform. Store coils where they won’t get crushed.
- Keep the ends capped. Worth repeating — capped during storage, not just during install.
- Secure them. A coil that rolls off a truck bed or down a slope is a damaged coil. Strap them or chock them.
Transporting without damage
On the truck, coils should be secured so they don’t shift, bounce, or get crushed under other material. Don’t toss tools or fittings on top of a coil. If you’re picking up from us in Calgary, we’ll load it sensibly — but how it rides to the job site is on you. A few minutes with a ratchet strap beats explaining a kinked lineset to your customer.
Inspect before you install
Before a lineset goes in, give it a quick once-over: run your hands along it feeling for flat spots or kinks, check the insulation jacket for tears, confirm the ends are capped and clean inside. If you find a kink, don’t try to straighten it and hope for the best — cut out the damaged section or replace the run. A compromised lineset installed today is a callback tomorrow, and callbacks cost more than copper.
What we supply
Our pre-insulated linesets — 1/4″ × 3/8″, 1/4″ × 1/2″, and 3/8″ × 5/8″ — ship as protected 25 ft coils with the insulation and jacket factory-applied. They arrive in good shape; keeping them that way on your truck and your site is the rest of the job. Stock and contractor pricing are confirmed at the time of quotation. Need coils for several jobs? See bulk orders. In Calgary? Pickup or delivery is by confirmed arrangement.
Need linesets for a project? Call 587-437-0483 or send your material list to info@corelinehvac.ca and we’ll confirm stock and contractor pricing.