My voting was the only real answer i think, not entirely sure a heat gun would get the pipe hot enough to melt the solder - having said that I have never tried it......

Ditto, can't see a heat gun getting it hot enough.

engine 2
The copper pipe on this engine was soldered by using a heat gun but thats not the heating in my home with floor boards naild down and carpet over the joints

Jacko

I bought one of these for my brother in law, in exchange for him plumbing my bathroom;

ROTHENBERGER GAS SOLDERING IRON SOLDER BLOW TORCH 1950 °C NEW | eBay

It worked fine for the whole job.

Whichever method you use, you'll probably find one of these invaluable;

eBay Item

Phil

Do it properly. Gas torch, heat map, wire wool, flux, lead free solder. Get it hot enough to melt the solder but not burn off the flux, don't apply the heat whilst melting the solder, don't apply too much solder, quick wipe around the pipe to leave a nice fillet and don't touch it till it's cooled down. And get a pipe bender and make nice gentle corners rather than using 90 degree solders which will leave noise. And don't forget expansion on long runs so make the pipe a Z shape.

quote:

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Originally posted by BenB
Do it properly. Gas torch, heat map, wire wool, flux, lead free solder. Get it hot enough to melt the solder but not burn off the flux, don't apply the heat whilst melting the solder, don't apply too much solder, quick wipe around the pipe to leave a nice fillet and don't touch it till it's cooled down. And get a pipe bender and make nice gentle corners rather than using 90 degree solders which will leave noise. And don't forget expansion on long runs so make the pipe a Z shape.

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