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Old 02-12-2010, 12:27 AM   #1858
amlim
Senior Member
 
Join Date: Jun 2000
Posts: 1,761
from what i read abt R410A and R22 refrigerant, if it is R410A piping you can use R22, but not the other way. Some contractors claimed that if they can "clean" the pipes using R22 so that they can use the new R410A.

well... prob... but the new R410A olso uses higher pressure and needs thicker Cu pipes. Need to consider this as well.
I got another question.

Assume that I use back the old piping for the new R410A air con and later the old pipe spoil.

Can I then ask the contractor to install new piping which is not hidden (ie it is installed on the walls) for the aircon?

Sorry if this is a stupid question.

Thanks.
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