Can you solder copper when wet

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. Stop the trickle of water with a pipe plug.

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. The join is not clean enough. If you’re using a good flux, then the copper isn’t clean enough.

How long does it take for copper solder to dry?

Solder won’t fill spots that are cooler than its melting point. Fill the joint until solder drips out, then move on to the next joint. Give the joint 30 to 45 seconds to cool and harden before putting pressure on it. Be careful; it’ll still be too hot to touch.

Can I solder a leaking joint?

Drain the water, then solder Dry the outside of the elbow and sand (120-grit paper or cloth) around the leaking joint to remove all surface corrosion. … Add new solder until a shiny ring of solder shows all around the joint.

How long after soldering can I turn water on?

If you followed these instructions, the joint is likely very tight. The only good way to test is to put pressure on the joint (turn on the water to the house). Be sure to wait until the solder has cooled (2-3 minutes) before pressurizing the line to avoid the solder cracking due to a quick change in temperature.

Does solder flux go bad?

Flux cored solder wire has a limited shelf life determined by the alloy used in the wire. For alloys containing more than 70% lead, the shelf life is two years from date of manufacture. Other alloys have a shelf life of three years from date of manufacture.

What is the purpose of flux when soldering?

The main purpose of the flux is to prepare the metal surfaces for soldering by cleaning and removing any oxides and impurities. Oxides are formed when metal is exposed to air and may prevent the formation of good solder joints.

Can I solder copper pipe with a soldering iron?

You don’t. Soldering irons and guns are better suited to electrical soldering (or stained glass). A soldering gun (even high wattage units) isn’t going to give you enough heat, and even if it could it’s not going to heat the pipes uniformly.

Can you Resolder copper pipe?

Soldering vertical copper pipe shouldn’t be too different from working horizontally. If the joint and tip are hot enough, the solder should flow right in. Heat the middle of the fitting and apply the solder as soon as it starts to melt. Remove the heat once the solder starts moving.

Can I solder over old solder?

Just heat the joint up with your torch, once the solder starts to melt use Channel locks to pull the fittings apart. Once the joint is apart, wipe as much old solder off as you can with a rag. Now you can start over.

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Can you reuse soldered copper fittings?

Copper pipes and fittings are used in many plumbing systems. … Copper pipes are usually connected together using a variety of fittings, including elbows, T’s and couplings. You can remove copper fittings and reuse them by following a straightforward procedure that requires a moderate amount of time and effort.

Which flux is used for copper soldering?

Superior Flux NumberNo. 135DescriptionRosin Paste Flux – OK for ElectronicsRec. Base MetalsCopperRec. SoldersTin-Based; Lead-Free or Lead-BearingRec. Temp Ranges95-315°C / 200-600°F

Can you overheat copper pipe?

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.

How do you know if your solder joints are good?

A good solder joint should have an even band of solder showing all the way around. If you see an area that looks as if it needs more solder, brush a little flux onto the joint. If the joint is still warm, the flux will melt and flow into the void.

How long does it take to heat a copper pipe?

Five to 10 seconds of heating with a MAPP gas torch is all that’s required before you can feed solder into most 1/2- to 3/4-in. pipes and fittings. Be careful, though.

Can I 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.

Can you use 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!

Do you have to use flux when soldering copper?

Flux prevents the copper from oxidizing as you heat the copper with the torch. … You can solder without flux, but it is really difficult! Flux is applied to both the pipe and the fitting with a handy miniature paint brush. You do not need massive amounts to be effective.

Why is my soldering not sticking?

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 freeze flux?

What happens to solder paste or paste flux if it is frozen? In many cases, nothing happens. However, some pastes are susceptible to damage that impairs performance. As a consequence, we recommend not freezing any of our solder pastes or paste fluxes.

Why does my solder not melt?

Slosh the flux around and flux the solder. make sure it all gets hot enough, if the solder isn’t melting at all you simply are not getting enough heat.

Can you melt solder with a heat gun?

As well as all kinds of other DIY jobs, a heat gun is very handy for soldering copper pipes. It’s most suitable for working with soft solder with a melting point below 400°C. Before soldering, you need to thoroughly clean and carefully assemble your workpiece, but you can easily do it yourself.

What is best solder 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.

How strong is a soldered copper joint?

Many engineers and field plumbers don’t realize that when you braze copper rather than solder copper joints, you reduce the pressure rating to that of annealed tube. A soldered four-inch Type L joint has a pressure rating of 440 psi.

Can you Unsweat a copper fitting?

Sweat or unsweat copper pipe joints with a hand-held torch. Plumbers join copper pipe with a torch and soldering paste in a process called sweating pipe. The plumber applies the solder to the juncture of the pipe and fitting, making it watertight and permanent. … This process is known as unsweating pipe.

Can you solder copper twice?

If you have a leaky joint and the joint leaks at the solder connection, you can re-solder or “re-sweat” the joint to eliminate the leak. Although you must work with a blowtorch to repair the leak, you can do so as long as you feel comfortable working with a blowtorch. …

Does Flex Seal work on copper pipes?

Flex Seal will work on roofs, gutters, skylights, windowsills, flashings, downspouts, foundations, awnings, chimneys, vent pipes, RV’s, campers, trailers. It can be applied to wood, copper and other metals, concrete, masonry, glass, fabric, plastics and much more.

Can you reheat solder joint?

If the solder joint is made properly the first time, there will be no “voids or channels” when you reheat and rotate it.

Is propane good for soldering?

Propane works fine, it just takes longer—which may work to your advantage if you are new to soldering copper and are working on 3/4-inch or 1/2-inch pipe. The choice of a torch is really up to you.

Will a propane torch melt solder?

Swab a little flux around the end of the tubing and inside the ends of the elbows and then push the joint together. I used a common everyday, readily available propane torch to solder the copper tubing together. You can get a cylinder of propane and the torch at any big box home improvement or hardware store.

Can you anneal copper with a propane torch?

Can I anneal copper tubing with a propane torch? Yes, but it will take much longer to get red hot compared to using MAP gas or oxy/acetylene.