# How much power do I need to soft solder small piping?

I'm thinking about a few hobby projects and the tools I might need for them. Specifically I'm thinking about getting a butane soldering torch that can also be equipped with tips for electronics works. The Seller gives the power as 130 W, max. temp when using tips 580°C, the free flame is presumably hotter.

Is 130 W enough to soft solder small pipes and fittings, I'm thinking up to DN32 (1 1/4") at most? Or should I discard the idea to have one tool for electronics and piping work, and go for different tools?

To be clear, I'm talking about soft soldering, using lead free solder for potable water applications - likely melting ranges are between 220°C and 250°C.

This is the product I was thinking about.

• A 1" copper pipe will suck up a huge amount of heat. I'd guess no. You need thorough heating to get good solder flow, not barely enough. Plumbing torches aren't terribly expensive and they're useful for lots of other things, like lighting large quantities of bottle rockets. :D Commented Apr 15, 2020 at 19:50
• Temperature is what melts solder. A variable temp soldering iron will do any electric soldering you will want to do. A soldering iron is not used for pipes and plumbing. A torch that burn gas it the proper tool for sweating pipes. Commented Apr 15, 2020 at 19:54
• it is a torch but a small one. The two of you seem to have experience - do you know the approx. power of the torches you use? That would be the kernel of an anser.
– mart
Commented Apr 15, 2020 at 19:55
• A torch burns gas, it does not have power, it can not have 130 w. There seems to be a miss understanding. More info is needed. What is 130 w ? Usually the term W in conjunction with the term power means Watts, as in electricity. Commented Apr 15, 2020 at 19:57
• 130 W is 130 Watts. I just did a more thorough search and finally find a soldering torch where the power was given 3.5kW so it seems the two of you are right and the torch I'm looking at is to weak.
– mart
Commented Apr 15, 2020 at 20:01