Copper tubing size. - http://www.hvacmechanic.com/ Forums
Original message
| sormi
 |  "Copper tubing size."
, posted Mon 22 Sep 13:05  
I'm about to have a new AC unit hooked up to my house. It's a
3 1/2 ton 14 sear R410 Rheem. The contractor said it should use a 1 1/8 copper line. Mine is 7/8. Now he's saying the 7/8 will be fine. Any adivce on what it should be?
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Replies:
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| acefurnacefxr
| "Re(1):Copper tubing size." , posted Mon 22 Sep 20:32
7/8 3/8 will be fine............u dont need 1 1/8 until u get to 5 ton, and even then on a short run 7/8 will work.
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| Lou Lopasco
| "Re(1):Copper tubing size." , posted Mon 22 Sep 18:50
That depends...how long will the line set end up being?
*Rookie HVAC service and installations. 3 years on the force!*
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| | sormi
| "Re(2):Copper tubing size." , posted Mon 22 Sep 19:26
About 12 feet.
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| | aircooled
| "Re(3):Copper tubing size." , posted Tue 23 Sep 08:52
12 ft. of copper manufactures state line set min.15ft or flood back can be present.
I would add to line set, 7/8" is fine.
"People will forget what you said people will forget what you did but people will never forget how you made them feel."
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