QA

Question: How To Solder Copper Plumbing Pipe

Is soldering copper pipe hard?

Soldering copper water supply lines is not a difficult skill. Even a rookie can learn to solder leak-proof joints in 30 minutes. The process is simple—if you follow a few basic guidelines.

What kind of solder do you use for copper pipes?

What Type of Solder is Used for Copper Pipe? Lead free solder is best for copper pipes carrying drinking water. It will be free of elements you don’t want entering your drinking water. However it will require a higher melting point than a 50/50 solder.

Why does my solder not stick to copper pipe?

the solder is hot enough, but the copper is not hot enough. Heat the copper more before applying the solder. The join is not clean enough. If you’re using a good flux, then the copper isn’t clean enough.

Do you need flux to solder copper pipe?

After a thorough cleaning, coat the pipe and fitting with flux before heating the joint. This helps solder flow into the joint. You may find two or three kinds of flux on the shelf. We recommend tinning flux.

Can you overheat copper pipe when soldering?

Overheating is a major problem when brazing or soldering copper pipe because the flux will burn (become oxidized), stop working, and become a barrier to tinning. In addition, a heavy oxide can be formed on the pipe itself, preventing a bond from forming between the filler metal and the pipe surface.

Can you solder pipes with water in them?

Don’t try to solder pipes with water in them. Soldering a joint in pipes that contain even tiny amounts of water is nearly impossible. Most of the heat from the torch goes into turning the water to steam, so the copper won’t get hot enough to melt the solder.

Can I solder copper pipe with a soldering iron?

Sure — if the iron is large enough to heat the piece of copper to the proper temperature (copper is an excellent conductor of heat, so it may take a larger heat source than a soldering iron), and you have good solder with the proper flux, and some skill.

What is the most commonly used solder in plumbing?

Acid core solders are most often used in plumbing applications to join metal pipes or sheet metal. Rosin core solder is also fabricated with a hollow core inside the solder wire, but the flux used is a milder variety made of rosin, which is a solid form of resin derived from conifers such as pine.

Can I use electrical solder on copper pipe?

Electrical solder is generally hollow, with a core made of a flux intended to solder copper wires. This flux is not made for copper water pipes. You will want to use a separate paste flux especially made for sweating copper water pipe (and a small brush to apply it). Some electrical solders contain an amount of lead.

Is rosin core solder good for plumbing?

Typically, electrical solder contains rosin core flux; plumbing solder uses an acid-based flux. So it’s not a good idea to use plumbing solder for electrical connections because the acid in the flux can damage the wiring and lead to connection failure.

Can you solder copper pipe with a butane torch?

A butane torch creates a flame that can reach a maximum temperature of about 2,500 degrees Fahrenheit. These high temperatures—coupled with butane’s long flames, which can reach up to 6 inches long—make these torches capable of melting and soldering metals like copper and silver.

Can I solder without flux?

Good solder joints simply do not result from working without flux. At low heat the solder might not melt fast enough, and a cold solder joint may result. At high heat the soldering tip may oxidize and that will make soldering almost, if not downright impossible!.

Why is the solder not melting?

The solder melts and doesn’t cling at all to the tip, it only balls up, as if fleeing from the tip. The tip is so damaged, so oxidized that essentially the tip should not (or cannot) be used for soldering anymore. Short answer: Your tip is so badly oxidized, it cannot do what it is meant to do.

Why does my solder stick to my tip?

The solder is sticking to the tip of your iron because of lack of heat transfer usually caused by oxidation . 1. Everything should be clean and shiny and tinned-the iron tip, the pads or whatever your soldering to and the leads of the part.

Why can’t I get my solder to stick?

A classic reason solder won’t stick to something is because you’re not getting it hot enough. My interns come to me with this problem all the time. Make sure the tip of the iron is nice and shiny. Touch some solder on it, and it should melt almost instantly.

Can you use Vaseline as flux?

Can You Use Vaseline as Flux? Yes, Vaseline works just as well as commercial flux, and you can even buy a generic brand. Petroleum jelly is primarily made from waxes and mineral oils so that it won’t corrode your components. Plus, it cleans away the gunk and eliminates metal oxides that could compromise your bond.

How long should I wait to turn water on after soldering?

30 seconds should be long enough. Once the solder has solidified, you are good to go. The water will only make it solidify faster by cooling, but if it is still molten, the water pressure will separate and/or pollute the joint.