I have A/C units that look like the one in the following page:
Now, one of the unit needs to be replaced. Is it necessary to replace
also the copper pipes (I assume they are for freon)? The pipes are
inside concrete wall. So, if they need to be replaced, that'll be a problem.
Best practice is to replace them. What is holding them in the
concrete? Often they are in a sleeve of some sort so they can be
replaced. Copper should not be in contact with the concrete as over
the years it can cause corrosion and leaks.
My guess is the installer has run into this before and knows what to
Needs to be replaced, why? The why helps determine
if the copper tubing should be replaced.
The copper tubes are for refrigerant. Freon is a
brand name. The tubes may carry Freon, Isotron,
Genetron, Forane, or some other brand of
If they are not corroded and are the right size, no reason to
replace. When I replaced my outer unit, it was originally a threaded
fitting and the new unit was a braze-in so I just cut off the fittings
and brazed the lines to the new unit.
In alt.home.repair, on Mon, 17 Aug 2015 21:59:17 -0400,
If the lines are 40 years old, but they've never lost their charge, they
might still be not corroded and usable???
(Mine are 36, but I'm planning ahead. Last 2 years, no AC. This year,
portable AC that works quite well, doesn't make enough noise to bother
me (which surprises me). What bothers me is having the window shut and
the bedroom door shut. I've only needed it 6 times so far this summer,
so no rush about the central air, yet I know I'll want to fix it
On Tuesday, August 18, 2015 at 12:13:39 PM UTC-4, micky wrote:
Yes, they might not be corroded or then again they might. Take your pic.
Which is why most installers put in a new line set. They only
cost $200 for a typical run. If they are inside an inaccessible
location, like running vertically inside a wall, and they look
in good condition, then installers will flush them and re-use.
Some installers will re-use them anyway to keep the price down.
In alt.home.repair, on Wed, 19 Aug 2015 06:07:16 -0700 (PDT), trader_4
I was planning to replace them, but just wanted to be prepared if that
turned out to be "impossible". If someone said, even if they look
good, at that age, they are sure to be no good, I'd find osomeone to do
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