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you only need to clean the pipe if it's really oxidized or if there is some tape residue. if you aren't sure you can use some sand screen on it. I looked at our local tractor supply store and the have some 1\8" brazing rod called weld-it, made by Hobart so if you can find a Hobart dealer you...

if you want to solder the hole shut you will need some silver solder, your friend should be able to get it where he works. If he can't get any I have also seen it at Tractor supply. as for the torch, if you can find one the pro's use the turbo torch is good up to about 5/8 line any bigger you...

if you are going to do any brazing on refrigerant lines you need to run nitrogen through the lines to keep them from scaling. you also should either change or replace the filter drier. if you don't you stand a chance of moisture being in the system or scaling coming loose and causing a blockage.

I haven't thought about that but I will check it today and let you know what I find. Thanks for the idea

Thanks for the ideas . The old unit was a 3 ton w/80,000 furnace and still had the same problems to an extent because I had to replace the bottom half of the plenum.I figured that if I insulated the plenum and trunk line it would stop it. (plenum is insulated with 1/2" blue board.) The heat...

I just put in a new 80,000 btu Bryant furnace & 31/2 ton heat pump(new 410 freon). This unit replaced a fifteen year old furnace and 3 ton a/c. I wanted a larger unit this time because the 3 ton didn't cool the house on really hot days. Here's the problem the trunk line under the house is...

Hello, Iwas just wandering around and stumbled on this site. I have worked for almost 30 yrs. doing hvac,plumbing,some elect. before becoming disabled. I am always looking for new things . I also may be able to hopefully offer some advice. This is the first time that I have used A forum so I...