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Home Repair - - If it ain't broken, don't fix it. Otherwise look here.
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Posted by John‰] on September 15, 2006, 1:28 pm
Just had a new central air unit installed and it had to be moved to a
new location, so a new line set was required. I had a coil of 3/4"
copper that I had traded for, so I offered it to my HVAC guy for the
line set. He looked at it and said that he couldn't use it because it
was "plumbing copper" and was manufactured with a seam. If you tried
to run R-22 through it, it would leak like a sieve.
He is completely trustworthy and I have no reason to question him, but
I started wondering about the types of copper tubing.
If you can't use "plumbing copper" for refrigerant, can you use
"refrigeration copper" for plumbing? What tubing do you need for
natural gas? What are the correct names for the different types of
copper?
Can someone school me please?
John
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Posted by Edwin Pawlowski on September 15, 2006, 1:48 pm
"John?] "
> Just had a new central air unit installed and it had to be moved to a
> new location, so a new line set was required. I had a coil of 3/4"
> copper that I had traded for, so I offered it to my HVAC guy for the
> line set. He looked at it and said that he couldn't use it because it
> was "plumbing copper" and was manufactured with a seam. If you tried
> to run R-22 through it, it would leak like a sieve.
>
> He is completely trustworthy and I have no reason to question him, but
> I started wondering about the types of copper tubing.
>
> If you can't use "plumbing copper" for refrigerant, can you use
> "refrigeration copper" for plumbing? What tubing do you need for
> natural gas? What are the correct names for the different types of
> copper?
>
> Can someone school me please?
This will be a start http://www.bomiltubing.com/
There are many differences in materials, annealing, and sizing for different
uses. Refrigeration tubing is generally soft, seamless, and purged with an
inert gas to keep it clean and free of oxidation. Cleanliness is very
important on a sealed system.
Plumbing tubing had different wall thickness for supply lines and drain
lines.
Soft copper is often used for propane, but some areas do not allow it for
natural gas.
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Posted by Toller on September 15, 2006, 2:18 pm
>
> "John?] "
>> Just had a new central air unit installed and it had to be moved to a
>> new location, so a new line set was required. I had a coil of 3/4"
>> copper that I had traded for, so I offered it to my HVAC guy for the
>> line set. He looked at it and said that he couldn't use it because it
>> was "plumbing copper" and was manufactured with a seam. If you tried
>> to run R-22 through it, it would leak like a sieve.
>>
>> He is completely trustworthy and I have no reason to question him, but
>> I started wondering about the types of copper tubing.
>>
>> If you can't use "plumbing copper" for refrigerant, can you use
>> "refrigeration copper" for plumbing? What tubing do you need for
>> natural gas? What are the correct names for the different types of
>> copper?
>>
>> Can someone school me please?
>
> This will be a start http://www.bomiltubing.com/
>
I hate to think what the handyman tubing is; or what it might be used for,
for that matter.
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Posted by Pat on September 15, 2006, 2:37 pm
John=89]
wrote:
> Just had a new central air unit installed and it had to be moved to a
> new location, so a new line set was required. I had a coil of 3/4"
> copper that I had traded for, so I offered it to my HVAC guy for the
> line set. He looked at it and said that he couldn't use it because it
> was "plumbing copper" and was manufactured with a seam. If you tried
> to run R-22 through it, it would leak like a sieve.
>
> He is completely trustworthy and I have no reason to question him, but
> I started wondering about the types of copper tubing.
>
> If you can't use "plumbing copper" for refrigerant, can you use
> "refrigeration copper" for plumbing? What tubing do you need for
> natural gas? What are the correct names for the different types of
> copper?
>
> Can someone school me please?
>
> John
My father was an AC mechanic, so of course our house was plumbed with
AC copper. Thicker walls as I remember it, because of the pressure.
When we were all out of the house and my father was in the hospital for
something, my mother had some plumbing problem and called a plumber.
His fittings and such wouldn't work and he was confused. My mother
called me and asked if I knew what was up and I suggested that the
plumber go back to his truck and get his AC equipment. All was then
fine, but we had one confused plumber. Thankfully the guy also did a
little AC on the side.
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Posted by Sacramento Dave on September 15, 2006, 6:06 pm
"John?] "
>
> Just had a new central air unit installed and it had to be moved to a
> new location, so a new line set was required. I had a coil of 3/4"
> copper that I had traded for, so I offered it to my HVAC guy for the
> line set. He looked at it and said that he couldn't use it because it
> was "plumbing copper" and was manufactured with a seam. If you tried
> to run R-22 through it, it would leak like a sieve.
>
> He is completely trustworthy and I have no reason to question him, but
> I started wondering about the types of copper tubing.
>
> If you can't use "plumbing copper" for refrigerant, can you use
> "refrigeration copper" for plumbing? What tubing do you need for
> natural gas? What are the correct names for the different types of
> copper?
>
> Can someone school me please?
>
> John
Plumbing copper Yellow stripe is DWV ( drain waste vent ) Thin walled. Red
stripe Type M little thicker wall used for condensate line low pressure but
have seen it used for water, Blue stripe type L most common for water lines
above ground. Green stripe Type K very thick underground High pressure not
used very often. Then there is soft rolled mostly for underground no joints.
Most plumping copper is measured by inside diameter, Refrigeration tubing is
measured by outside diameter.
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