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Soldering brass connector to copper pipes - MAPP? (Read 1266 times)
thescruff
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Re: Soldering brass connector to copper pipes - MAPP?
Reply #11 - Feb 26th, 2013, 8:43am
 
Denso tape or similar is best.
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russellmre
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Re: Soldering brass connector to copper pipes - MAPP?
Reply #10 - Feb 26th, 2013, 7:51am
 
I certainly did consider screwfix connectors, but for some reason they don't have them here (i live in belgium)
however, success! I managed to solder with a test piece, applying lots of flux while heating up the joint. I'll do the real thing today.
thanks for the suggestions! I don't know how I would have managed otherwise..  There are plenty of online soldering instructions and videos, but none of them tell you how to deal with this problem.
Another question - if the copper pipes are buried in the walls, is it enough to wrap them in insulating tape to protect them from contact with plaster/expansion? I've also heard that newspaper can be used for this purpose too
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Headrush
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Re: Soldering brass connector to copper pipes - MAPP?
Reply #9 - Feb 25th, 2013, 5:53pm
 
That torch should do fine.

Have you considered using flexible tap connectors? Dead easy to fit and cheap as horseburgers at Screwfix..
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russellmre
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Re: Soldering brass connector to copper pipes - MAPP?
Reply #8 - Feb 25th, 2013, 4:42pm
 
looks a bit like this:
http://www.2ememain.be/construction/outils-et-machines/soudeuse/lampe-%C3%A0-sou...

just a basic bottom of the range lamp

flux - I asked the shop which one to use, it's for copper (the other option was for steel)

brass fitting - female threaded to join copper pipe to tap, I bought it in brass because it that's all that was available
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Re: Soldering brass connector to copper pipes - MAPP?
Reply #7 - Feb 25th, 2013, 4:32pm
 
Normal propane is fine if the torch is.

Perhaps a pic showing the torch would be good or at best the size of the burner.

As above dip the solder in the tub as you go.

What flux are you using.

Why brass fittings what are they.
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Re: Soldering brass connector to copper pipes - MAPP?
Reply #6 - Feb 25th, 2013, 3:32pm
 
just been to the hardware shop, a cylinder of MAPP gas costs 17 euros but the lamp that goes with it costs 120. I'll try it the way you suggest with propane first
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Re: Soldering brass connector to copper pipes - MAPP?
Reply #5 - Feb 25th, 2013, 3:09pm
 
Yes, always start with a fully cleaned and fluxed joint. As you evenly heat the brass, keep dropping flux onto the joint with the end of your solder, hopefully your solder will suddenly run in.

When the joint has cooled, clean it up with some wire wool and use a torch with a small mirror to look round the joint. You should see a bright ring all around inside joint, it might be microscopic but you should see it.
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Re: Soldering brass connector to copper pipes - MAPP?
Reply #4 - Feb 25th, 2013, 2:15pm
 
if I do it as you suggested with propane and adding flux at the same time as the solder, should I also put flux on before applying heat, or will the residue from it burning just stop the solder spreading properly?
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Re: Soldering brass connector to copper pipes - MAPP?
Reply #3 - Feb 25th, 2013, 1:07pm
 
You have already stated you never soldered before so I can't guarentee anything. Yes it should be easier but you should also be able to do it as described above. Try practising on some old fittings to get a feel for it.
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Re: Soldering brass connector to copper pipes - MAPP?
Reply #2 - Feb 25th, 2013, 11:29am
 
so it would definitely be a lot easier with MAPP gas?
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Re: Soldering brass connector to copper pipes - MAPP?
Reply #1 - Feb 25th, 2013, 11:04am
 
Very tricky..  Try adding more flux as the joint heats up by scooping it from the container on the end of the solder and laying it on the joint. The flux will bubble and fizz and run into the joint at the same time. Do this several times and if your lucky you will hit the perfect temp for the solder to suddenly run with it. Also rotate the flame around the brass joint to get a more even spread of heat and avoid hot spots.

Failing that, a bottle of MAPP gas is still a lot cheaper than getting a plumber in  Wink
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Soldering brass connector to copper pipes - MAPP?
Feb 25th, 2013, 8:31am
 
Never having done soldering before, as part of my bathroom renovation project I've been trying to solder a brass fitting to a length of copper pipe. I've followed the instructions carefully - cleaning the pipe and inside of the fitting with emery paper, applying flux, joining the pipe and fitting then heating the brass fitting till it is hot enough to make the solder melt. Unfortunately though the solder isn't sucked into the joint the way it is supposed to. I've read up on this on the internet and what people say is that with a propane blow torch it takes too long to heat up the brass fitting and as a result the flux burns off before you can apply the solder - it is recommended to use MAPP gas instead. I'm not terribly keen on that as it is quite expensive for just doing two joints so does anybody know if it is really necessary or is there a way of doing it with propane?
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