Solder for plumbing

What kind of solder do you use for 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 you use electrical solder 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.

What is plumbing solder made of?

Lead-free solders in commercial use may contain tin, copper, silver, bismuth, indium, zinc, antimony, and traces of other metals.

What solder is used for copper pipe?

Buy lead-free solder that’s designed for copper water pipes; you’ll find it in the plumbing section of the store. Solder with lead is still available, but the lead can leach into your water supply, so don’t use it.

Can I solder without flux?

It’s ok, if you can do it, but it’s very difficult to solder without flux . The flux breaks down the oxide layers on the metal surfaces and allows the solder to “wet” them. If it doesn’t wet, it doesn’t make a connection. It’s normally always necessary to use flux when you solder .

Can you use too much flux when soldering?

If you are using normal solder wire, it contains all the flux you need. If you are soldering copper pipe for example, excess flux will simply probably not compromise the joint, but will simply drip away.

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Can plumbing solder go bad?

No, it can ‘t go bad . A properly done solder joint will last the lifetime of the piping. Sometimes you get a cold solder joint in which the two pieces of the joint do not bond(usually caused by bad preparation) but it seems to seal for a while then starts leaking. If it looks clean it is good.

Will plumbing solder work on steel?

Soldering with a propane torch is the easiest way to join copper and brass. You can even use solder to join copper or brass to stainless steel , you just need the proper flux. Use plumbing (silver) solder only. Do not use electrical or jeweler’s solder because these often contain lead or cadmium.

Why is the solder not sticking to copper pipe?

the solder is hot enough, but the copper is not hot enough. Heat the copper more before applying the solder . If you’re using a good flux, then the copper isn’t clean enough. It needs to be cleaned with steel wool, it must be shiny clean on the outside of the pipe .

When did Plumbers stop using lead solder?


What can be used instead of flux?


Can I use silver solder for plumbing?

Because soldered joints made with tin-antimony and tin- silver are stronger, plumbing systems installed using them can withstand higher pressures and temperatures than systems made with 50-50 tin-lead solder .

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 .

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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.

What is the best torch for soldering copper pipe?

MAPP gas torches