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45 Degree Copper Elbow

How to measure HVAC & Refrigeration tubing
  • Refrigeration tubing is measured by it's outside diameter O.D: 1/4, 1/2, 5/8, 3/4, 7/8, 1-1/8, 1-3/8, 1-5/8, etc.
  • Plumbing tubing is measured by it's inside diameter I.D: 1/8, 1/4, , 1/4, 1, 1-1/4, 1-1/2, 1-3/4,etc.Rule of Thumb: "HVAC" nominal tube sizing 1/8; larger than the same nominal size "plumbing" pipe.
  • So for example, a 1/4" HVAC fitting, is the same as a 1/8" Plumbing1fitting. Or a 1/2" HVAC fitting, is the same as a 1/4" Plumbing fitting.
  • For HVAC a 1/2" fitting, will fit on a pipe that's 1/2" on the "outside" (OD), as the fitting has an opening of 1/2".But for plumbing it will fit onto a pipe that is 1/4" on the "inside" (ID) which equals to 1/2 on the outside.
HVAC Premium has been providing superior in quality service for many many years. Our products are second to none, and we've helped numerous contractors, DIY projects, and home improvement remodeling specialists complete their masterpiece. If you are looking for a top of the line unit to enhance your project look no further than HVAC Premium. We have the largest selection of Grilles Registers & Diffusers.

Use our 99.9% PURE COPPER lead-free tees with solder connections for your plumbing needs to provide a branch supply line from a main line. Our tees are constructed to be smooth and seamless to create a leak-proof connection. You can use these copper tees for all things plumbing including drinking water, air conditioning, and refrigeration application projects in both residential and commercial systems.

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Why HVAC Premium? 

You may think of grilles and registers as a generic component of the ventilation system in your house, but they are also the most visible representation of your air system. With HVAC Premium you get an extra measure of quality that will be visible to your family members and house guests.